6. Acoustical simulation of straight and side inlet/outlet rectangular plenums using the FEM method

Size: px
Start display at page:

Download "6. Acoustical simulation of straight and side inlet/outlet rectangular plenums using the FEM method"

Transcription

1 Research Signpost 37/661 (2), Fort P.O. Trivandrum Kerala, India Noise Control: Theory, Application and Optimization in Engineering, 2014: ISBN: Editors: Min-Chie Chiu and J. H. Huang 6. Acoustical simulation of straight and side inlet/outlet rectangular plenums using the FEM method Ying-Chun Chang 1, Min-Chie Chiu 2 and Yi-HSin Chou 1 1 Department of Mechanical Engineering, Tatung University; 2 Department of Mechanical and Automation Engineering, Chung Chou University of Science and Technology Abstract. Noise can cause psychological and physiological ailments in industrial plants. Because of this, noise control must be seriously addressed. In order to reduce low frequency noise emitted from venting systems, plenum systems are customarily used. To find better mechanisms for plenums within a constrained space, eleven side inlet/outlet rectangular plenums (plenums A~K) and a straight rectangular plenum (plenum L) are proposed. These will be simulated using a finite element method (FEM) run on COMSOL, which is a commercial package. Before the FEM simulation is performed, the accuracy of the FEM is verified using analytical data from Ih. Consequently, the acoustical simulation of the plenum system using a FEM method proposed in this study is an efficient method for predicting the acoustical performance of the plenums with complicated mechanisms. Correspondence/Reprint request: Dr. Min-Chie Chiu, Department of Mechanical and Automation Engineering, Chung Chou University of Science and Technology, Taiwan 104, R.O.C.. minchie.chiu@msa.hinet.net

2 120 Ying-Chun Chang et al. 1. Introduction Noise causing psychological and physiological ailments is often found in industrial plants. And so, noise control is crucial [1, 2]. Various acoustical elements used in reducing sound energy have been widely assessed. In 1974, Cummings [3] investigated the acoustical performance of a curved duct having a rectangular section and a circular section. Later, Rostafinski [4] proposed a mathematical model for a sound wave that propagated along a curved duct. In 1999, Kim and Ih [5] predicted the acoustical efficiency of a curved expanded chamber using a four-pole matrix. In addition, much research has been directed toward the flow velocity and temperature gradient as they relate to the reactive muffler [6, 7, 8]. Kim and Ih [9] have also developed a sound-reduction mathematical model used in a sound energy transported along a curved and expanded duct that uses a four-pole transfer matrix. In order to depress the venting noise emitted from an industrial plant, a plenum system is customarily employed [10]. Munjal [11] analyzed the acoustical performance of a one-chamber side inlet/outlet plenum using the plane wave theory. Li and Hansen [12], in 2005, estimated the acoustical performance of a rectangular plenum using theoretical and experimental data. Later, in 2009, Liu and Herrin [13] evaluated the influence of the plenum s acoustical performance with respect to the perforated hole s distance using a finite element method. However, the plenum designs mentioned above focused on a one-chamber plenum in which the acoustical mechanism was a simple plenum without baffles. Therefore, the acoustical performance of the above plenums was limited. In order to enhance the acoustical performance of the plenum system, eleven side inlet/outlet rectangular plenums (plenums A~K) and a straight rectangular plenum (plenum L) within a fixed space will be introduced and simulated by using a finite element method (FEM) which is run on COMSOL. 2. Mathematical Model of the FEM (Run on the COMSOL Package) The boundary condition for the acoustical field (a solid boundary) of the plenum used in the acoustical model on the COMSOL package is 1 n { ( pt q)} = 0 (1) ρ c

3 FEM simulation on side inlet/outlet rectangular plenums 121 where q (a dipole sound source) is set at zero, c (the sound speed) is set at 343 (m/s), ρ (air density) is set at ( 3 kg m ). Assuming that a plane wave with a sound pressure (p) of 1 (Pa) propagates into the plenum s inlet, the governing equation of the sound wave yields 2 1 keq pt ( pt q ) Q ρ ρ = (2a) where t c b c p = p+ p (2b) k ω = ( ) (2c) 2 2 eq cc cc ρc = c (2d) = ρ (2e) Here, pb is the background pressure field. The Sound Transmission Loss (TL) is calculated as Win TL = 10log (3) W where out W is the inlet sound power and in W is the outlet sound power. out 3. Model check Before performing the acoustical simulation on plenums, an accuracy check of the FEM mathematical model on the fundamental elements of a straight type one-chamber plenum and a side inlet/outlet one-chamber plenum shown in Fig. 1 and Fig. 2 was performed using analytical data from Ih [14]. As revealed in Fig. 1 and Fig. 2, the FEM (run on the COMSOL package) and the analytical data for the two plenums are in agreement. Consequently, the simulation of eleven side inlet/outlet rectangular plenums (plenums A~K) and a straight rectangular plenum (plenum L) within a fixed space simulated by using the finite element method (FEM) is carried out in the following section.

4 122 Ying-Chun Chang et al. Figure 1. Accuracy check of a straight plenum compared to the Ih theory [14] and COMSOL. Figure 2. Accuracy check of a side inlet/outlet plenum compared to the Ih theory [14] and COMSOL. 4. Case studies In this paper, eleven side inlet/outlet rectangular plenums (plenums A~K) and a straight rectangular plenum (plenum L) within a fixed space will be analyzed using the finite element method (FEM).

5 FEM simulation on side inlet/outlet rectangular plenums Mechanism of a side inlet/outlet plenum (Plenum A) As indicated in Fig. 3, a side inlet/outlet plenum with a fixed length of 0.7 m is proposed for acoustical simulation where the section of the plenum is 0.12 m in length and 0.12 m in width (L=0.12 m). In addition, the dimensions of the inlet and outlet duct are 0.04 m in length and 0.04 m in width. Figure 3. Mechanism of a side inlet/outlet plenum (plenum A) Mechanism of a side inlet/outlet plenum hybridized with a center-hole baffle (Plenum B) As indicated in Fig. 4, a side inlet/outlet plenum with a fixed length of 0.7 m is introduced for acoustical simulation. The section of the plenum is 0.12 m in length and 0.12 m in width (L=0.12 m). Also, the dimensions of the inlet and outlet duct are 0.04 m in length and 0.04 m in width. A baffle with a rectangular hole of L1*L1 is located inside the plenum. The STL with respect to L1/L of 0.25 and 1.0 is assessed.

6 124 Ying-Chun Chang et al. Figure 4. Mechanism of a side inlet/outlet plenum hybridized with a center-hole baffle (plenum B) Mechanism of a side inlet/outlet plenum hybridized with two center-hole baffles (Plenum C) As indicated in Fig. 5, a side inlet/outlet plenum with a fixed length of 0.7 m, a fixed width of 0.12 m, and a fixed height of 0.12 m is adopted for acoustical simulation. The dimensions of the inlet and outlet duct are set at 0.04 m in length and 0.04 m in width. Two baffles with rectangular holes of L1*L1 are inserted inside the plenum. The influence of the acoustical performance with respect to the ratio of L1/L and the simulation of STL at L1/L of 0.25 and 1.0 is assessed.

7 FEM simulation on side inlet/outlet rectangular plenums 125 Figure 5. Mechanism of a side inlet/outlet plenum hybridized with two center-hole baffles (plenum C). 4.4 Mechanism of a side inlet/outlet plenum hybridized with a center-hole and an extruding baffle (Plenum D) As indicated in Fig. 6, a side inlet/outlet plenum with a fixed length of 0.7 m, a fixed width of 0.12 m, and a fixed height of 0.12 m is used for acoustical simulation. The dimensions of the inlet and outlet duct that are 0.04 m in length and 0.04 m in width are fixed. A baffle is connected with a rectangular extruding tube that is L2 in length, L1 in width, and L1 in height. To analyze the influence of the acoustical performance with respect to L2 at a fixed ratio of L1/L (=0.25), the simulation of STL at L2 of 0.2 and 0.4 is assessed.

8 126 Ying-Chun Chang et al. Figure 6. Mechanism of a side inlet/outlet plenum hybridized with a center-hole extruding baffle (plenum D) Mechanism of a side inlet/outlet plenum hybridized with two center holes and two extruding baffles (Plenum E) As indicated in Fig. 7, a side inlet/outlet plenum with a fixed length of 0.7 m, a fixed width of 0.12 m, and a fixed height of 0.12 m is analyzed for acoustical simulation. Here, the dimensions of the inlet and outlet duct that are 0.04 m in length and 0.04 m in width are preset. Two baffles are connected with rectangular extruding tubes that are L2 in length, L1 in width, and L1 in height. To understand the influence of the acoustical performance with respect to the rectangular extruding tubes, the simulation of STL at L2 of 0.2 and L1/L with and without adding the rectangular extruding tubes is assessed.

9 FEM simulation on side inlet/outlet rectangular plenums 127 Figure 7. Mechanism of a side inlet/outlet plenum hybridized with two center-hole extruding baffles (plenum E) Mechanism of an extended side inlet/outlet plenum (Plenum F) As indicated in Fig. 8, an extended side inlet/outlet plenum with a fixed length of 0.7 m is proposed for acoustical simulation that is 0.12 m in length and 0.12 m in width (L=0.12 m). In addition, the dimensions of the inlet and outlet duct are set at 0.04 m in length and 0.04 m in width. Here, the extended length at the side inlet and outlet is 0.06 m.

10 128 Ying-Chun Chang et al. Figure 8. Mechanism of an extended side inlet/outlet plenum (plenum F) Mechanism of a side inlet/outlet plenum hybridized with a center-hole and a tilted extruding baffle (Plenum G) As indicated in Fig. 9, a side inlet/outlet plenum with a fixed length of 0.7 m, a fixed width of 0.12 m, and a fixed height of 0.12 m is used for acoustical simulation. The dimensions of the inlet and outlet duct are 0.04 m in length and 0.04 m in width and are preset. A baffle is connected with a tilted rectangular extruding tube that is L2 in length, L1 in width, and L1 in height. To analyze the influence of the acoustical performance with respect to θ(the tilted angle) at a fixed ratio of L1/L (=0.25) and a fixed L2 (=0.2), the simulation of STL atθ of (-15 o, 0 o, and 15 o ) is assessed.

11 FEM simulation on side inlet/outlet rectangular plenums 129 Figure 9. Mechanism of a side inlet/outlet plenum hybridized with a center-hole and a tilted extruding baffle (plenum G) Mechanism of a side inlet/outlet plenum hybridized with a centerhole and contracted/expanded extruding baffle (Plenum H-1 and Plenum H-2) As indicated in Figs. 10 and 11, a side inlet/outlet plenum with a fixed length of 0.7 m, a fixed width of 0.12 m, and a fixed height of 0.12 m is introduced for acoustical simulation. The dimensions of the inlet and outlet duct are 0.04 m in length and 0.04 m in width and are preset. Two baffles are connected with two contracted/expanded rectangular extruding tubes (with an angle of 15 o ) that are L2 in length, L1 in width, and L1 in height. To investigate the influence of the acoustical performance with respect to the contraction/expansion effect on the extruding tubes fixed at L2 (=0.2), a simulation of the STL for two plenums shown in Figs. 10 and 11 is assessed.

12 130 Ying-Chun Chang et al. Figure 10. Mechanism of a side inlet/outlet plenum hybridized with a center-hole and an contracted extruding baffle (plenum H-1). Figure 11. Mechanism of a side inlet/outlet plenum hybridized with a center-hole and an expanded extruding baffle (plenum H-2).

13 FEM simulation on side inlet/outlet rectangular plenums Mechanism of a side inlet/outlet plenum hybridized with a center-splitter baffle (Plenum I) As indicated in Fig. 12, a side inlet/outlet plenum with a fixed length of 0.7 m, a fixed width of 0.12 m, and a fixed height of 0.12 m is adopted for acoustical simulation. The dimensions of the inlet and outlet duct are also fixed with 0.04 m in length and 0.04 m in width. A baffle with a rectangular opening (splitter shape) is inserted inside the plenum. To analyze the influence of the acoustical performance with respect to the ratio L1/L, the simulation of the STL with respect to L1/L (0, 0.2, 0.4) is assessed. Figure 12. Mechanism of a side inlet/outlet plenum hybridized with a center-splitter baffle (plenum I) Mechanism of a side inlet/outlet plenum hybridized with two center-splitter baffles (Plenum J) As indicated in Fig. 13, a side inlet/outlet plenum with a fixed length of 0.7 m, a fixed width of 0.12 m, and a fixed height of 0.12 m is proposed for acoustical simulation. The dimensions of the inlet and outlet duct are 0.04 m in length and 0.04 m in width. Two baffles with two rectangular openings

14 132 Ying-Chun Chang et al. Figure 13. Mechanism of a side inlet/outlet plenum hybridized with two centersplitter baffles (plenum J). (splitter shapes) are located within the plenum. To understand the influence of the acoustical performance with respect to the ratio L1/L, the simulation of the STL with respect to L1/L (0, 0.2, 0.4) is assessed Mechanism of a side inlet/outlet plenum hybridized with four crossed baffles (Plenum K) As indicated in Fig. 14, a side inlet/outlet plenum has a fixed length of 0.7 m, a fixed width of 0.12 m, and a fixed height of 0.12 m. The dimensions of the inlet and outlet duct are 0.04 m in length and 0.04 m in width. Four baffles are crossed within the plenum. To understand the influence of the acoustical performance with respect to the ratio L1/L, the simulation of STL with respect to L1/L (0, 0.2, 0.4) is assessed.

15 FEM simulation on side inlet/outlet rectangular plenums 133 Figure 14. Mechanism of a side inlet/outlet plenum hybridized with four crossed baffles (plenum K) Mechanisms of multi-chamber straight plenums (Plenum L-1, Plenum L-2, Plenum L-4, Plenum L-8, and Plenum L-16) As indicated in Figs. 15 and 16, straight plenums hybridized with one, two, four, eight, and sixteen simple expansion chambers have lengths of 0.7 m. To understand the influence of the acoustical performance with respect to the number of chambers at L of 0.12 m, the simulation of the STL with respect to the number of chambers (1, 2, and 4) and (1, 8, and 16) is assessed. Moreover, in order to evaluate the acoustical effect of the section s length, the simulation of the STL for a four-chamber straight plenum and a eight-chamber straight plenum with respect to an L of 0.12, 0.16, and 0.2 m is assessed.

16 134 Ying-Chun Chang et al. Figure 15. Mechanisms of one-chamber, two-chamber, and four-chamber straight plenums (plenums L-1, L-2, and L-4 ). Figure 16. Mechanisms of one-chamber, eight-chamber, and sixteen-chamber straight plenums (plenums L-1, L-8, and L-16).

17 FEM simulation on side inlet/outlet rectangular plenums Results and discussion 5.1 Results By using the FEM in the acoustical simulation of plenums A~L, the results of the STL profiles with respect to the key parameters are shown in Figs , 31, and 33. The STL with respect to the ratio L1/L for plenum B is depicted in Fig. 17. In addition, the STL with respect to the ratio L1/L for plenum C is shown in Fig. 18. To evaluate the baffle effect, a comparison of STLs for plenums equipped with no baffle, one baffle, and two baffles (plenums A, B, and C) is illustrated in Fig. 19. Similarly, the STL with respect to L2 for plenum D is plotted in Fig. 20. The STL with respect to L2 for plenum E is depicted in Fig. 21. To understand the extended effect at the inlet and the outlet of the plenum, the simulated result of the STL with respect to L2 is shown in Fig. 22. Likewise, to understand the influence of the tilted angle (θ) for the baffle s extruding duct, the tilted angle effect for the acoustic performance is simulated and plotted in Fig. 23. Subsequently, the comparison of STLs for plenums equipped with no extruding tube, a contracted extruding tube, and an expanded extruding tube (plenums D, H-1, and H-2) is shown in Fig. 24. And, in order to realize the influence of the acoustical performance with respect to a baffle hybridized with a center-splitter baffle, the STL with respect to the ratio L1/L for plenum I is assessed and shown in Fig. 25. Moreover, to realize the influence of the acoustical performance with respect to two baffles hybridized with two center-splitter baffles, the STL with respect to the ratio L1/L for plenum J is assessed and shown in Fig. 26. Furthermore, for plenum K, the investigation of the STL with respect to the ratio L1/L for a plenum hybridized with four crossed baffles is also carried out and illustrated in Fig. 27. Equally, to initiate the influence of the acoustical performance with respect to the number of plenum chambers (plenum L), the STLs with respect to one chamber, two chambers, and four chambers are simulated and plotted in Fig. 28. Also, the STLs with respect to one chamber, eight chambers, and sixteen chambers are simulated and plotted in Fig. 29. Moreover, in order to analyze the influence of the acoustical performance with respect to the length of the section (L) in plenum L-4 (shown in Fig. 30), the STL with respect to L is simulated and plotted in Fig. 31. Consequently, the STL with respect to L for plenum L-16 (shown in Fig. 32) is simulated and depicted in Fig Discussion As indicated in Fig. 17, for plenum B with one center-hole baffle, the broadband STL will be improved if the ratio L1/L decreases. This means that

18 136 Ying-Chun Chang et al. the acoustical performance will greatly increase if the opening of the baffle decreases. Similarly, as indicated in Fig. 18, the broadband STL for plenum C with two center-hole baffles will increase if the ratio L1/L (baffle s opening ratio) decreases. Also, Fig. 19 indicates that plenum C with more center-hole baffles is superior to plenum B and plenum A. And, plenum A without a center-hole baffle is not as good as the other two plenums. Therefore, the smaller opening ratio of the center-hole baffle will result in a larger STL. As indicated in Fig. 20, for plenum D with a center-hole and an extruding baffle, it is obvious that the STLs for a plenum having one centerhole and extruding baffles is better than that of plenum B which is without a center-hole and an extruding baffle. Similarly, Fig. 21 indicates that the STLs for plenum E with two center-holes and an extruding baffle is better than a plenum without a center-hole and an extruding baffle (plenum B). Therefore, the acoustical effect of the center-hole and extruding baffle is superior. As seen in Fig. 22, for plenum F, the STL will greatly increase if the internally extended length (L2) of the side inlet/ outlet is added. Therefore, the acoustical effect for the internally extended length (L2) of the side inlet/ outlet is essential. As shown in Fig. 23, the influence of the acoustical performance for plenum G with respect to the tilted angle θ is trivial. Therefore, the variation of tilted angle for a baffle hybridized with an extruding duct is not important. Fig. 24 indicates that STLs for plenum H equipped with no extruding tube, a contracted extruding tube, and an expanded extruding tube (plenums D, H-1, and H-2) are similar. The effect of contraction and expansion for an extruding tube linked with a baffle is small. Equally, as indicated in Fig. 25, for plenum I (equipped with one centersplitter baffle), the ratio L1/L for the center-splitter baffle will influence the STL at higher frequencies (beyond 1250 Hz). The acoustical effect for the ratio L1/L will be invalid for low frequencies. Similarly, Fig. 26 reveals that the influence of STL with respect to the ratio L1/L for plenum J (equipped with two center-splitter baffles) is trivial in lower frequencies and effective in higher frequencies. Therefore, the changes of the ratio L1/L will somewhat improve the STL at higher frequencies. Also, as indicated in Fig. 27, the influence of the acoustical performance with respect to the ratio L1/L of crossed baffles in plenum K is obvious in higher frequencies; however, the effect of the ratio L1/L will be trivial for low frequencies. Furthermore, Figs. 28 and 29 illustrates that the STL is proportional to the number of chambers inside plenum L. In addition, the STL curve will be

19 FEM simulation on side inlet/outlet rectangular plenums 137 broadened when the chambers increase. Therefore, the increment of the number of straight plenums will largely increase the broadband STL. Moreover, as indicated in Fig. 31, for a straight plenum with four chambers, the STL will increase and the profile will be broadened when the L of plenum L-4 increases. Consequently, as indicated in Fig. 33, for a straight plenum with eight chambers, the STL will shift to the left (low frequency region) when the L of plenum L-8 increases. This means that the acoustical performance in lower frequencies will increase when the length of the section increases. Figure 17. STL with respect to the L1/L ratio for plenum B. Figure 18. STL with respect to the L1/L ratio for plenum C.

20 138 Ying-Chun Chang et al. Figure 19. Comparison of STLs for plenums equipped with no baffles, one baffle, and two baffles (plenums A, B, and C). Figure 20. STL with respect to L2 for plenum D. Figure 21. STL with respect to L2 for plenum E.

21 FEM simulation on side inlet/outlet rectangular plenums 139 Figure 22. STL with respect to L2 for plenum F. Figure 23. STL with respect to θ for plenum G. Figure 24. Comparison of STLs for plenums equipped with no extruding tubes, a contracted extruding tube, and an expanded extruding tube (plenums D, H-1, and H-2).

22 140 Ying-Chun Chang et al. Figure 25 STL with respect to the L1/L ratio for plenum I. Figure 26 STL with respect to the L1/L ratio for plenum J. Figure 27. STL with respect to the L1/L ratio for plenum K.

23 FEM simulation on side inlet/outlet rectangular plenums 141 Figure 28. Comparison of STLs for plenums equipped with 1 chamber, 2 chambers, and 4 chambers (plenums L-1, L-2, and L-4). Figure 29. Comparison of STLs for plenums equipped with 1 chamber, 8 chambers, and 16 chambers (plenums L-1, L-8, and L-16). Figure 30. Mechanism of a straight plenum (plenum L-4).

24 142 Ying-Chun Chang et al. Figure 31. STL with respect to L for plenum L-4. Figure 32. Mechanism of a straight plenum (plenum L-8). Figure 33 STL with respect to L for plenum L-8.

25 FEM simulation on side inlet/outlet rectangular plenums Conclusion To find a better mechanism in plenum design, eleven side inlet/outlet rectangular plenums (plenums A~K) and a straight rectangular plenum (plenum L) within a fixed space are introduced and simulated by using a finite element method (FEM) which is run on COMSOL, a commercial package. Simulated results indicate that for a plenum with one center-hole baffle, the smaller opening ratio of the center-hole baffle will result in a larger STL. In addition, for a plenum with center-hole and extruding baffles, the STLs for a plenum with a center-hole and an extruding baffles (plenums D and E) is better than a plenum without a center-hole and an extruding baffle (plenum B). Also, for plenum F, the acoustical effect for the internally extended length (L2) of the side inlet/ outlet is essential. And, for a plenum with center-splitter baffles, the variety of the ratios L1/L will somewhat improve the STL at higher frequencies. Furthermore, the influence of STL with respect to the ratio L1/L of the crossed baffles in plenum K is effective in higher frequencies and trivial in lower frequencies. Moreover, the increment of the number of the straight plenums will increase the broadband STL. Additionally, for a straight plenum, the STL will increase and the profile will be broadened when L of the plenum L-4 increases. Furthermore, the STL in lower frequencies will increase when the size (L) of the plenum L-8 s section increases. Consequently, the acoustical simulation of a plenum system using the FEM method proposed in this study provides an efficient way to predict the acoustical performance of the plenums with complicated mechanisms. References 1. Ising, H., Kruppa, B., Health Effects Caused by Noise: Evidence in the Literature from the Past 25 Years, Noise and Health, 2004, 6, Willich, S. N., Wegscheider, K., Stallmann, M., Keil, T., Noise Burden and the Risk of Myocardial Infarction, European Heart Journal, 2006, 27, Cummings, A., Sound Transmission in Curved Ducts Bends, Journal of Sound and Vibration, 1974, 35, Rostafinski, W., Transmission of Wave Energy in Curved Ducts, Journal of the Acoustical Society of America, 1974, 56, Kim, J. T., Ih, J. G.., Transfer Matrix of Curved Duct Bends and Sound Attenuation in Curved Expansion Chambers, Applied Acoustics, 1999, 56, Prasad, M. G., Crocker, M. J., Studies of Acoustical Performance of a Multicylinder Engine Exhaust Muffler System, Journal of Sound and Vibration, 1983, 90(4),

26 144 Ying-Chun Chang et al. 7. Prasad, M. G., A Note on Acoustic Plane Waves in a Uniform Pipe With Mean Flow, Journal of Sound and Vibration, 1984, 95(2), Munjal, M. L., Acoustics of Ducts and Mufflers with Application to Exhaust and Ventilation, John Wiley and Sons, New York, Kim, J. T., Ih, J. G., Transfer Matrix of Curved Duct Bends and Sound Attenuation in Curved Expansion Chambers, Applied Acoustics, 1999, 56, Magrab, E. B., Environmental Noise Control; John Wiley & Sons, New York, Munjal, M. L., Plane Wave Analysis of Side Inlet/outlet Chamber Mufflers with Mean Flow, Applied Acoustics, 1997, 52, Li, X., Hansen, C. H., Comparison of Models for Predicting the Transmission Loss of Plenum Chambers, Applied Acoustics, 2005, 66(7), Liu, J., Herrin, D. W., Enhancing Micro-perforated Panel Attenuation by Partitioning the Adjoining Cavity, Applied Acoustics, 2010, 71, Ih, J. G., The Reactive Attenuation of Rectangular Plenum Chambers, Journal of Sound and Vibration, 1992, 157(1),

ISSN (PRINT): ,(ONLINE): ,VOLUME-2,ISSUE-4,2016 1

ISSN (PRINT): ,(ONLINE): ,VOLUME-2,ISSUE-4,2016 1 A STUDY ON THE ACOUSTIC PERFORMANCE OF A REACTIVE MUFFLER Shemin Thomas Varkey 1, Lalu P. P 2, K. Balakrishnan 3 1 Post Graduate Student, Government Engineering College, Thrissur, 2 Assistant Professor,

More information

e t Performance of Extended Inlet and Extended Outlet Tube on Single Expansion Chamber for Noise Reduction

e t Performance of Extended Inlet and Extended Outlet Tube on Single Expansion Chamber for Noise Reduction e t International Journal on Emerging Technologies 7(1): 37-41(2016) ISSN No. (Print) : 0975-8364 ISSN No. (Online) : 2249-3255 Performance of Extended Inlet and Extended Outlet Tube on Single Expansion

More information

Influence of Cylinder Bore Volume on Pressure Pulsations in a Hermetic Reciprocating Compressor

Influence of Cylinder Bore Volume on Pressure Pulsations in a Hermetic Reciprocating Compressor Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2014 Influence of Cylinder Bore Volume on Pressure Pulsations in a Hermetic Reciprocating

More information

Improving muffler performance using simulation-based design

Improving muffler performance using simulation-based design Improving muffler performance using simulation-based design Fangsen CUI 1 *; Ying WANG 2 ; Richard Chao CAI 3 1 Institute of High Performance Computing, A*STAR, Singapore 2 Jinan Dejia Machine Pte Ltd,

More information

Comparing FEM Transfer Matrix Simulated Compressor Plenum Pressure Pulsations to Measured Pressure Pulsations and to CFD Results

Comparing FEM Transfer Matrix Simulated Compressor Plenum Pressure Pulsations to Measured Pressure Pulsations and to CFD Results Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2012 Comparing FEM Transfer Matrix Simulated Compressor Plenum Pressure Pulsations to Measured

More information

Optimization of Suction Muffler Using Taguchi s DOE Method

Optimization of Suction Muffler Using Taguchi s DOE Method Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 006 Optimization of Suction Muffler Using Taguchi s DOE Method Sanjay S. Gosavi Kirloskar

More information

Acoustic design of the air transparent soundproofing wall

Acoustic design of the air transparent soundproofing wall PROCEEDINGS of the 22 nd International Congress on Acoustics Materials for Noise Control: Paper ICA2016-323 Acoustic design of the air transparent soundproofing wall Seong-Hyun Lee (a), Junghwan Kook (b),

More information

Noise Reduction in a Reciprocating Compressor by Optimizing the Suction Muffler

Noise Reduction in a Reciprocating Compressor by Optimizing the Suction Muffler Noise Reduction in a Reciprocating Compressor by Optimizing the Suction Muffler Katakama Nagarjuna ¹ K.Sreenivas² ¹ M.tech student, ²Professor, dept of mechanical engineering kits, markapur, A.P, INDIA

More information

Development of Shape of Helmholtz Resonator Cavity for Attenuation of Low Frequency Noise of Pure Reactive Muffler

Development of Shape of Helmholtz Resonator Cavity for Attenuation of Low Frequency Noise of Pure Reactive Muffler Development of Shape of Helmholtz Resonator Cavity for Attenuation of Low Frequency Noise of Pure Reactive Muffler Amit Kumar Gupta 1, Nirmal Gupta 2 1 Assistant Professor, 2 M.E. Scholar Mechanical Engineering

More information

Silencers. Transmission and Insertion Loss

Silencers. Transmission and Insertion Loss Silencers Practical silencers are complex devices, which operate reducing pressure oscillations before they reach the atmosphere, producing the minimum possible loss of engine performance. However they

More information

CFD Investigation of Influence of Tube Bundle Cross-Section over Pressure Drop and Heat Transfer Rate

CFD Investigation of Influence of Tube Bundle Cross-Section over Pressure Drop and Heat Transfer Rate CFD Investigation of Influence of Tube Bundle Cross-Section over Pressure Drop and Heat Transfer Rate Sandeep M, U Sathishkumar Abstract In this paper, a study of different cross section bundle arrangements

More information

SELECTED ASPECTS OF MODELING MUFFLERS FOR EXHAUST SYSTEMS OF VEHICLES

SELECTED ASPECTS OF MODELING MUFFLERS FOR EXHAUST SYSTEMS OF VEHICLES Journal of KONES Powertrain and Transport, Vol. 0, No. 013 SELECTED ASPECTS OF MODELING MUFFLERS FOR EXHAUST SYSTEMS OF VEHICLES Andrzej Ggorowski Warsaw University of Technology Faculty of Transport Koszykowa

More information

Acoustics and Flow Field Analysis of Perforated Muffler Design

Acoustics and Flow Field Analysis of Perforated Muffler Design Acoustics and Flow Field Analysis of Perforated Muffler Design Mr. Sumit Surve 1, Mr. Suraj Kumbhar 2, Dr. S. S. Goilkar 3 1,2 ME (Machine Design) Student, 3 Principal, 1,2 Department of Mechanical Engineering,

More information

Characteristics of wheel-rail vibration of the vertical section in high-speed railways

Characteristics of wheel-rail vibration of the vertical section in high-speed railways Journal of Modern Transportation Volume, Number 1, March 12, Page -15 Journal homepage: jmt.swjtu.edu.cn DOI:.07/BF03325771 Characteristics of wheel-rail vibration of the vertical section in high-speed

More information

Noise Reduction of Accumulators for R410A Rotary Compressors

Noise Reduction of Accumulators for R410A Rotary Compressors Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2008 Noise Reduction of Accumulators for R410A Rotary Compressors Ling Li Guangdong Meizhi

More information

Theoretical and Experimental Investigation of Compression Loads in Twin Screw Compressor

Theoretical and Experimental Investigation of Compression Loads in Twin Screw Compressor Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2004 Theoretical and Experimental Investigation of Compression Loads in Twin Screw Compressor

More information

Change in Delta Plate Angle Effect on the Reactive Muffler

Change in Delta Plate Angle Effect on the Reactive Muffler Change in Delta Plate Angle Effect on the Reactive Muffler Haresh V. Vegad 1,Brijesh R. Naik 2 (M.Tech Student 1,Asst.Professor 2 ) (Automobile Engineering Department, Chhotubhai Gopalbhai Patel Institute

More information

Optimization of Transmission Loss of Perforated Tube Muffler by using CAE Tool ANSYS

Optimization of Transmission Loss of Perforated Tube Muffler by using CAE Tool ANSYS Optimization of Transmission Loss of Perforated Tube Muffler by using CAE Tool ANSYS Abhijeet Pratap 1, Ujjal Kalita 1, Sushil Kumar 2 1 (Student, Department of Mechanical Engineering, Lovely Professional

More information

Heat Transfer Enhancement for Double Pipe Heat Exchanger Using Twisted Wire Brush Inserts

Heat Transfer Enhancement for Double Pipe Heat Exchanger Using Twisted Wire Brush Inserts Heat Transfer Enhancement for Double Pipe Heat Exchanger Using Twisted Wire Brush Inserts Deepali Gaikwad 1, Kundlik Mali 2 Assistant Professor, Department of Mechanical Engineering, Sinhgad College of

More information

COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF THE ACOUSTIC PERFORMANCE OF VARIOUS SIMPLE EXPANSION CHAMBER MUFFLERS

COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF THE ACOUSTIC PERFORMANCE OF VARIOUS SIMPLE EXPANSION CHAMBER MUFFLERS COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF THE ACOUSTIC PERFORMANCE OF VARIOUS SIMPLE EXPANSION CHAMBER MUFFLERS Middelberg, J.M., Barber, T.J., Leong, S. S., Byrne, K.P and Leonardi, E. School of Mechanical

More information

Dynamic performance of flow control valve using different models of system identification

Dynamic performance of flow control valve using different models of system identification Dynamic performance of flow control valve using different models of system identification Ho Chang, Po-Kai Tzenog and Yun-Min Yeh Department of Mechanical Engineering, National Taipei University of Technology

More information

Back pressure analysis of an engine muffler using cfd and experimental validation

Back pressure analysis of an engine muffler using cfd and experimental validation Back pressure analysis of an engine muffler using cfd and experimental validation #1 Mr. S.S. Mane, #2 S.Y.Bhosale #1 Mechanical Engineering, PES s Modern College of engineering, Pune, INDIA #2 Mechanical

More information

Driver roll speed influence in Ring Rolling process

Driver roll speed influence in Ring Rolling process Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 207 (2017) 1230 1235 International Conference on the Technology of Plasticity, ICTP 2017, 17-22 September 2017, Cambridge, United

More information

Turbostroje 2015 Návrh spojení vysokotlaké a nízkotlaké turbíny. Turbomachinery 2015, Design of HP and LP turbine connection

Turbostroje 2015 Návrh spojení vysokotlaké a nízkotlaké turbíny. Turbomachinery 2015, Design of HP and LP turbine connection Turbostroje 2015 Turbostroje 2015 Návrh spojení vysokotlaké a nízkotlaké turbíny Turbomachinery 2015, Design of HP and LP turbine connection J. Hrabovský 1, J. Klíma 2, V. Prokop 3, M. Komárek 4 Abstract:

More information

Thermal Analysis of Shell and Tube Heat Exchanger Using Different Fin Cross Section

Thermal Analysis of Shell and Tube Heat Exchanger Using Different Fin Cross Section Thermal Analysis of Shell and Tube Heat Exchanger Using Different Fin Cross Section J. Heeraman M.Tech -Thermal Engineering Department of Mechanical Engineering Ellenki College of Engineering & Technology

More information

Forced vibration frequency response for a permanent magnetic planetary gear

Forced vibration frequency response for a permanent magnetic planetary gear Forced vibration frequency response for a permanent magnetic planetary gear Xuejun Zhu 1, Xiuhong Hao 2, Minggui Qu 3 1 Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System, Yanshan

More information

CFD Analysis and Comparison of Fluid Flow Through A Single Hole And Multi Hole Orifice Plate

CFD Analysis and Comparison of Fluid Flow Through A Single Hole And Multi Hole Orifice Plate CFD Analysis and Comparison of Fluid Flow Through A Single Hole And Multi Hole Orifice Plate Malatesh Barki. 1, Ganesha T. 2, Dr. M. C. Math³ 1, 2, 3, Department of Thermal Power Engineering 1, 2, 3 VTU

More information

Structural Analysis of Pick-Up Truck Chassis using Fem

Structural Analysis of Pick-Up Truck Chassis using Fem International Journal of ChemTech Research CODEN (USA): IJCRGG, ISSN: 0974-4290, ISSN(Online):2455-9555 Vol.9, No.06 pp 384-391, 2016 Structural Analysis of Pick-Up Truck Chassis using Fem Rahul.V 1 *,

More information

Analysis on natural characteristics of four-stage main transmission system in three-engine helicopter

Analysis on natural characteristics of four-stage main transmission system in three-engine helicopter Article ID: 18558; Draft date: 2017-06-12 23:31 Analysis on natural characteristics of four-stage main transmission system in three-engine helicopter Yuan Chen 1, Ru-peng Zhu 2, Ye-ping Xiong 3, Guang-hu

More information

Vol-3 Issue India 2 Assistant Professor, Mechanical Engineering Dept., Hansaba College of Engineering & Technology, Gujarat, India

Vol-3 Issue India 2 Assistant Professor, Mechanical Engineering Dept., Hansaba College of Engineering & Technology, Gujarat, India Review Paper on Effect of Variable Thermal Properties of Working Fluid on Performance of an IC Engine Cycle Desai Rahulkumar Mohanbhai 1, Kiran D. Parmar 2 1 P. G. Student, Mechanical Engineering Dept.,

More information

Analytical impact of the sliding friction on mesh stiffness of spur gear drives based on Ishikawa model

Analytical impact of the sliding friction on mesh stiffness of spur gear drives based on Ishikawa model Analytical impact of the sliding friction on mesh stiffness of spur gear drives based on Ishikawa model Zhengminqing Li 1, Hongshang Chen 2, Jiansong Chen 3, Rupeng Zhu 4 1, 2, 4 Nanjing University of

More information

The Performance Optimization of Rolling Piston Compressors Based on CFD Simulation

The Performance Optimization of Rolling Piston Compressors Based on CFD Simulation Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2004 The Performance Optimization of Rolling Piston Compressors Based on CFD Simulation

More information

AN INTAKE SILENCER FOR THE CONTROL OF MARINE DIESEL TURBOCHARGER COMPRESSOR NOISE

AN INTAKE SILENCER FOR THE CONTROL OF MARINE DIESEL TURBOCHARGER COMPRESSOR NOISE AN INTAKE SILENCER FOR THE CONTROL OF MARINE DIESEL TURBOCHARGER COMPRESSOR NOISE Liu Chen, Cao Yipeng, Zhang Wenping and Zhao Xiaochen Harbin Engineering University, College of Power and Energy Engineering,

More information

PERFORMANCE EVALUATION OF SILENCER BY SYSNOISE

PERFORMANCE EVALUATION OF SILENCER BY SYSNOISE Vol-3 Issue-1 217 PERFORMANCE EVALUATION OF SILENCER BY SYSNOISE Tushar C.Jagtap 1, Prof. Amol R. Patil 2, Prof. Sunil S. Raut 3, Prof. Arvind I. Ambesange 4 1 P. G. Student, in Mechanical (Design) Engineering

More information

Effect of concave plug shape of a control valve on the fluid flow characteristics using computational fluid dynamics

Effect of concave plug shape of a control valve on the fluid flow characteristics using computational fluid dynamics Effect of concave plug shape of a control valve on the fluid flow characteristics using computational fluid dynamics Yasser Abdel Mohsen, Ashraf Sharara, Basiouny Elsouhily, Hassan Elgamal Mechanical Engineering

More information

Chapter 7: Thermal Study of Transmission Gearbox

Chapter 7: Thermal Study of Transmission Gearbox Chapter 7: Thermal Study of Transmission Gearbox 7.1 Introduction The main objective of this chapter is to investigate the performance of automobile transmission gearbox under the influence of load, rotational

More information

Study on Flow Characteristic of Gear Pumps by Gear Tooth Shapes

Study on Flow Characteristic of Gear Pumps by Gear Tooth Shapes Journal of Applied Science and Engineering, Vol. 20, No. 3, pp. 367 372 (2017) DOI: 10.6180/jase.2017.20.3.11 Study on Flow Characteristic of Gear Pumps by Gear Tooth Shapes Wen Wang 1, Yan-Mei Yin 1,

More information

Finite Element Analysis of Clutch Piston Seal

Finite Element Analysis of Clutch Piston Seal Finite Element Analysis of Clutch Piston Seal T. OYA * F. KASAHARA * *Research & Development Center Tribology Research Department Three-dimensional finite element analysis was used to simulate deformation

More information

Thermal Stress Analysis of Diesel Engine Piston

Thermal Stress Analysis of Diesel Engine Piston International Conference on Challenges and Opportunities in Mechanical Engineering, Industrial Engineering and Management Studies 576 Thermal Stress Analysis of Diesel Engine Piston B.R. Ramesh and Kishan

More information

Pantograph and catenary system with double pantographs for high-speed trains at 350 km/h or higher

Pantograph and catenary system with double pantographs for high-speed trains at 350 km/h or higher Journal of Modern Transportation Volume 19, Number 1, March 211, Page 7-11 Journal homepage: jmt.swjtu.edu.cn 1 Pantograph and catenary system with double pantographs for high-speed trains at 35 km/h or

More information

DESIGN OF THROTTLE BODY: A COMPARATIVE STUDY OF DIFFERENT SHAFT PROFILES USING CFD ANALYSIS

DESIGN OF THROTTLE BODY: A COMPARATIVE STUDY OF DIFFERENT SHAFT PROFILES USING CFD ANALYSIS Int. J. Chem. Sci.: 14(S2), 2016, 681-686 ISSN 0972-768X www.sadgurupublications.com DESIGN OF TROTTLE BODY: A COMARATIVE STUDY OF DIFFERENT SAFT ROFILES USING CFD ANALYSIS M. BALAJI *, K. AMAL SATEES,

More information

1036. Thermal-hydraulic modelling and analysis of hydraulic damper for impact cylinder with large flow

1036. Thermal-hydraulic modelling and analysis of hydraulic damper for impact cylinder with large flow 1036 Thermal-hydraulic modelling and analysis of hydraulic damper for impact cylinder with large flow Y Guo, C P Liu, B W Luo Y Guo 1, C P Liu 2, B W Luo 3 1 Engineering Research Centre of Advanced Mining

More information

Simulation Studies on the Effect of Porous Twisted Plate Inserts on the Performance of Fire Tube Steam Packaged Boiler

Simulation Studies on the Effect of Porous Twisted Plate Inserts on the Performance of Fire Tube Steam Packaged Boiler Simulation Studies on the Effect of Porous Twisted Plate Inserts on the Performance of Fire Tube Steam Packaged Boiler S. Hassan *,a, M. K. Roslim b and R. M. Zain c Mechanical Engineering Department,

More information

Available online at ScienceDirect. Procedia CIRP 33 (2015 )

Available online at  ScienceDirect. Procedia CIRP 33 (2015 ) Available online at www.sciencedirect.com ScienceDirect Procedia CIRP 33 (2015 ) 581 586 9th CIRP Conference on Intelligent Computation in Manufacturing Engineering - CIRP ICME '14 Magnetic fluid seal

More information

Research on Pressure Loss for the Reverse-Flow Extended-Tube Muffler*

Research on Pressure Loss for the Reverse-Flow Extended-Tube Muffler* Research on Pressure Loss for the Reverse-Flow Extended-Tube Muffler* Jie Yao 1, Zhao-Xiang Deng 1,2, Pei-Ran Li 1, and Liang Yang 2 1 State Key Laboratory of Mechanical Transmission, Chongqing University,

More information

International Journal of Scientific & Engineering Research, Volume 5, Issue 7, July-2014 ISSN

International Journal of Scientific & Engineering Research, Volume 5, Issue 7, July-2014 ISSN ISSN 9-5518 970 College of Engineering Trivandrum Department of Mechanical Engineering arundanam@gmail.com, arjunjk91@gmail.com Abstract This paper investigates the performance of a shock tube with air

More information

Data envelopment analysis with missing values: an approach using neural network

Data envelopment analysis with missing values: an approach using neural network IJCSNS International Journal of Computer Science and Network Security, VOL.17 No.2, February 2017 29 Data envelopment analysis with missing values: an approach using neural network B. Dalvand, F. Hosseinzadeh

More information

DESIGN & OPTIMIZATION OF EXHAUST MUFFLER & DESIGN VALIDATION

DESIGN & OPTIMIZATION OF EXHAUST MUFFLER & DESIGN VALIDATION DESIGN & OPTIMIZATION OF EXHAUST MUFFLER & DESIGN VALIDATION 1 RAHUL D. NAZIRKAR, 2 S.R.MESHRAM, 3 AMOL D. NAMDAS, 4 SURAJ U. NAVAGIRE, 5 SUMIT S. DEVARSHI 1,2,3,4,5 Department of Mechanical Engineering,

More information

Muffler size minimization, using attenuation behaviour by acoustic simulation

Muffler size minimization, using attenuation behaviour by acoustic simulation ISSN 2395-1621 size minimization, using attenuation behaviour by acoustic simulation #1 Sandeep K Kakade, #2 Prof.Dr.F.B.Sayyad #12 G S Moze College of Engineering, Pune, India ABSTRACT ARTICLE INFO Engine

More information

THE LONGITUDINAL VIBRATION OF COMPOSITE DRIVE SHAFT

THE LONGITUDINAL VIBRATION OF COMPOSITE DRIVE SHAFT THE LONGITUDINAL VIBRATION OF COMPOSITE DRIVE SHAFT Tongtong Zhang, Yongsheng Li, Weibo Wang National Key Laboratory on Ship Vibration and Noise, China Ship Scientific Research Centre, Wuxi, China email:

More information

Analysis of minimum train headway on a moving block system by genetic algorithm Hideo Nakamura. Nihon University, Narashinodai , Funabashi city,

Analysis of minimum train headway on a moving block system by genetic algorithm Hideo Nakamura. Nihon University, Narashinodai , Funabashi city, Analysis of minimum train headway on a moving block system by genetic algorithm Hideo Nakamura Nihon University, Narashinodai 7-24-1, Funabashi city, Email: nakamura@ecs.cst.nihon-u.ac.jp Abstract A minimum

More information

Design and Test of Transonic Compressor Rotor with Tandem Cascade

Design and Test of Transonic Compressor Rotor with Tandem Cascade Proceedings of the International Gas Turbine Congress 2003 Tokyo November 2-7, 2003 IGTC2003Tokyo TS-108 Design and Test of Transonic Compressor Rotor with Tandem Cascade Yusuke SAKAI, Akinori MATSUOKA,

More information

Comparison of Swirl, Turbulence Generating Devices in Compression ignition Engine

Comparison of Swirl, Turbulence Generating Devices in Compression ignition Engine Available online atwww.scholarsresearchlibrary.com Archives of Applied Science Research, 2016, 8 (7):31-40 (http://scholarsresearchlibrary.com/archive.html) ISSN 0975-508X CODEN (USA) AASRC9 Comparison

More information

SOLAR FLAT PLATE COLLECTOR HEAT TRANSFER ANALYSIS IN THE RAISER WITH HELICAL FINS Mohammed Mohsin Shkhair* 1, Dr.

SOLAR FLAT PLATE COLLECTOR HEAT TRANSFER ANALYSIS IN THE RAISER WITH HELICAL FINS Mohammed Mohsin Shkhair* 1, Dr. ISSN 2277-2685 IJESR/May 2015/ Vol-5/Issue-5/352-356 Mohammed Mohsin Shkhair et. al./ International Journal of Engineering & Science Research SOLAR FLAT PLATE COLLECTOR HEAT TRANSFER ANALYSIS IN THE RAISER

More information

Electromagnetic Field Analysis for Permanent Magnet Retarder by Finite Element Method

Electromagnetic Field Analysis for Permanent Magnet Retarder by Finite Element Method 017 Asia-Pacific Engineering and Technology Conference (APETC 017) ISBN: 978-1-60595-443-1 Electromagnetic Field Analysis for Permanent Magnet Retarder by Finite Element Method Chengye Liu, Xinhua Zhang

More information

Performance of DC Motor Supplied From Single Phase AC-DC Rectifier

Performance of DC Motor Supplied From Single Phase AC-DC Rectifier Performance of DC Motor Supplied From Single Phase AC-DC Rectifier Dr Othman A. Alnatheer Energy Research Institute-ENRI King Abdulaziz City for Science and Technology- KACST P O Box 6086, Riyadh 11442,

More information

COMPRESSIBLE FLOW ANALYSIS IN A CLUTCH PISTON CHAMBER

COMPRESSIBLE FLOW ANALYSIS IN A CLUTCH PISTON CHAMBER COMPRESSIBLE FLOW ANALYSIS IN A CLUTCH PISTON CHAMBER Masaru SHIMADA*, Hideharu YAMAMOTO* * Hardware System Development Department, R&D Division JATCO Ltd 7-1, Imaizumi, Fuji City, Shizuoka, 417-8585 Japan

More information

Experimental Study Of Effect Of Tilt Angle Of The Flap On Transverse Vibration Of Plate

Experimental Study Of Effect Of Tilt Angle Of The Flap On Transverse Vibration Of Plate Experimental Study Of Effect Of Tilt Angle Of The Flap On Transverse Vibration Of Plate P. Mahadevaswamy a*, B.S. Suresh b a Department of Mechanical Engineering, Acharya Institute of Technology, Bangalore.

More information

CFD ANALYSIS ON LOUVERED FIN

CFD ANALYSIS ON LOUVERED FIN CFD ANALYSIS ON LOUVERED FIN P.Prasad 1, L.S.V Prasad 2 1Student, M. Tech Thermal Engineering, Andhra University, Visakhapatnam, India 2Professor, Dept. of Mechanical Engineering, Andhra University, Visakhapatnam,

More information

AN OPTIMAL PROFILE AND LEAD MODIFICATION IN CYLINDRICAL GEAR TOOTH BY REDUCING THE LOAD DISTRIBUTION FACTOR

AN OPTIMAL PROFILE AND LEAD MODIFICATION IN CYLINDRICAL GEAR TOOTH BY REDUCING THE LOAD DISTRIBUTION FACTOR AN OPTIMAL PROFILE AND LEAD MODIFICATION IN CYLINDRICAL GEAR TOOTH BY REDUCING THE LOAD DISTRIBUTION FACTOR Balasubramanian Narayanan Department of Production Engineering, Sathyabama University, Chennai,

More information

CFD Analysis of an Energy Scavenging Axial Flow Micro Turbine using Automotive Exhaust Gases

CFD Analysis of an Energy Scavenging Axial Flow Micro Turbine using Automotive Exhaust Gases International Conference of Advance Research and Innovation (-014) CFD Analysis of an Energy Scavenging Axial Flow Micro Turbine using Automotive Exhaust Gases Chitrarth Lav, Raj Kumar Singh Department

More information

EXPERIMENTAL INVESTIGATIONS OF DOUBLE PIPE HEAT EXCHANGER WITH TRIANGULAR BAFFLES

EXPERIMENTAL INVESTIGATIONS OF DOUBLE PIPE HEAT EXCHANGER WITH TRIANGULAR BAFFLES International Research Journal of Engineering and Technology (IRJET) e-issn: 2395-56 Volume: 3 Issue: 8 Aug-216 www.irjet.net p-issn: 2395-72 EXPERIMENTAL INVESTIGATIONS OF DOUBLE PIPE HEAT EXCHANGER WITH

More information

Application of Simulation-X R based Simulation Technique to Notch Shape Optimization for a Variable Swash Plate Type Piston Pump

Application of Simulation-X R based Simulation Technique to Notch Shape Optimization for a Variable Swash Plate Type Piston Pump Application of Simulation-X R based Simulation Technique to Notch Shape Optimization for a Variable Swash Plate Type Piston Pump Jun Ho Jang 1, Won Jee Chung 1, Dong Sun Lee 1 and Young Hwan Yoon 2 1 School

More information

IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 07, 2016 ISSN (online):

IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 07, 2016 ISSN (online): IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 07, 2016 ISSN (online): 2321-0613 Design, Optimization and Analysis of Exhaust Muffler to Reduce Exhaust Noise Level and

More information

REFINEMENT OF EXHAUST SYSTEM NOISE FROM LARGE DIESEL ENGINES USING ONE DIMENSIONAL (1D) SIMULATION

REFINEMENT OF EXHAUST SYSTEM NOISE FROM LARGE DIESEL ENGINES USING ONE DIMENSIONAL (1D) SIMULATION REFINEMENT OF EXHAUST SYSTEM NOISE FROM LARGE DIESEL ENGINES USING ONE DIMENSIONAL (1D) SIMULATION Abstract David Bowden 1 and James Forrest 2 1 Maritime Division, Defence Science and Technology Group,

More information

Finite Element Analysis on Thermal Effect of the Vehicle Engine

Finite Element Analysis on Thermal Effect of the Vehicle Engine Proceedings of MUCEET2009 Malaysian Technical Universities Conference on Engineering and Technology June 20~22, 2009, MS Garden, Kuantan, Pahang, Malaysia Finite Element Analysis on Thermal Effect of the

More information

837. Dynamics of hybrid PM/EM electromagnetic valve in SI engines

837. Dynamics of hybrid PM/EM electromagnetic valve in SI engines 837. Dynamics of hybrid PM/EM electromagnetic valve in SI engines Yaojung Shiao 1, Ly Vinh Dat 2 Department of Vehicle Engineering, National Taipei University of Technology, Taipei, Taiwan, R. O. C. E-mail:

More information

FEASIBILITY STYDY OF CHAIN DRIVE IN WATER HYDRAULIC ROTARY JOINT

FEASIBILITY STYDY OF CHAIN DRIVE IN WATER HYDRAULIC ROTARY JOINT FEASIBILITY STYDY OF CHAIN DRIVE IN WATER HYDRAULIC ROTARY JOINT Antti MAKELA, Jouni MATTILA, Mikko SIUKO, Matti VILENIUS Institute of Hydraulics and Automation, Tampere University of Technology P.O.Box

More information

CFD Analysis for Designing Fluid Passages of High Pressure Reciprocating Pump

CFD Analysis for Designing Fluid Passages of High Pressure Reciprocating Pump ISSN 2395-1621 CFD Analysis for Designing Fluid Passages of High Pressure Reciprocating Pump #1 SuhasThorat, #2 AnandBapat, #3 A. B. Kanase-Patil 1 suhas31190@gmail.com 2 dkolben11@gmail.com 3 abkanasepatil.scoe@sinhgadedu.in

More information

Simulating Rotary Draw Bending and Tube Hydroforming

Simulating Rotary Draw Bending and Tube Hydroforming Abstract: Simulating Rotary Draw Bending and Tube Hydroforming Dilip K Mahanty, Narendran M. Balan Engineering Services Group, Tata Consultancy Services Tube hydroforming is currently an active area of

More information

PREDICTION OF PISTON SLAP OF IC ENGINE USING FEA BY VARYING GAS PRESSURE

PREDICTION OF PISTON SLAP OF IC ENGINE USING FEA BY VARYING GAS PRESSURE PREDICTION OF PISTON SLAP OF IC ENGINE USING FEA BY VARYING GAS PRESSURE V. S. Konnur Department of Mechanical Engineering, BLDEA s Engineering College, Bijapur, Karnataka, (India) ABSTRACT The automotive

More information

DECEMBER 15-18, 1997 ADELAIDE, SOUTH AUSTRALIA. Y. K. Tso and R. G. Juniper

DECEMBER 15-18, 1997 ADELAIDE, SOUTH AUSTRALIA. Y. K. Tso and R. G. Juniper FIFTH INTERNATIONAL CONGRESS ON SOUND AND VIBRATION DECEMBER 15-18, 1997 ADELAIDE, SOUTH AUSTRALIA Invited Paper A STUDY OF THE TRANSMISSION OF NOISE AND VIBRATION IN AN ALUMINIUM MOTOR VESSEL Y. K. Tso

More information

Impacts of Short Tube Orifice Flow and Geometrical Parameters on Flow Discharge Coefficient Characteristics

Impacts of Short Tube Orifice Flow and Geometrical Parameters on Flow Discharge Coefficient Characteristics Impacts of Short Tube Orifice Flow and Geometrical Parameters on Flow Discharge Coefficient Characteristics M. Metwally Lecturer, Ph.D., MTC, Cairo, Egypt Abstract Modern offset printing machine, paper

More information

ANALYSIS OF SURFACE CONTACT STRESS FOR A SPUR GEAR OF MATERIAL STEEL 15NI2CR1MO28

ANALYSIS OF SURFACE CONTACT STRESS FOR A SPUR GEAR OF MATERIAL STEEL 15NI2CR1MO28 ANALYSIS OF SURFACE CONTACT STRESS FOR A SPUR GEAR OF MATERIAL STEEL 15NI2CR1MO28 D. S. Balaji, S. Prabhakaran and J. Harish Kumar Department of Mechanical Engineering, Chennai, India E-Mail: balajimailer@gmail.com

More information

Estimation of Unmeasured DOF s on a Scaled Model of a Blade Structure

Estimation of Unmeasured DOF s on a Scaled Model of a Blade Structure Estimation of Unmeasured DOF s on a Scaled Model of a Blade Structure Anders Skafte 1, Rune Brincker 2 ABSTRACT This paper presents a new expansion technique which enables to predict mode shape coordinates

More information

Simulation of Voltage Stability Analysis in Induction Machine

Simulation of Voltage Stability Analysis in Induction Machine International Journal of Electronic and Electrical Engineering. ISSN 0974-2174 Volume 6, Number 1 (2013), pp. 1-12 International Research Publication House http://www.irphouse.com Simulation of Voltage

More information

Torque Analysis of Magnetic Spur Gear with Different Configurations

Torque Analysis of Magnetic Spur Gear with Different Configurations International Journal of Electrical Engineering. ISSN 974-158 Volume 5, Number 7 (1), pp. 843-85 International Research Publication House http://www.irphouse.com Torque Analysis of Magnetic Spur Gear with

More information

Clearance Loss Analysis in Linear Compressor with CFD Method

Clearance Loss Analysis in Linear Compressor with CFD Method Clearance Loss Analysis in Linear Compressor with CFD Method Wenjie Zhou, Zhihua Gan, Xiaobin Zhang, Limin Qiu, Yinzhe Wu Cryogenics Laboratory, Zhejiang University Hangzhou, Zhejiang, China, 310027 ABSTRACT

More information

Aerodynamic Characteristics of Sedan with the Rolling Road Ground Effect Simulation System

Aerodynamic Characteristics of Sedan with the Rolling Road Ground Effect Simulation System Vehicle Engineering (VE) Volume 2, 2014 www.seipub.org/ve Aerodynamic Characteristics of Sedan with the Rolling Road Ground Effect Simulation System Yingchao Zhang 1, Linlin Ren 1, Kecheng Pan 2, Zhe Zhang*

More information

Namrata Agrawal 1, Santosh Devkare 2 ABSTRACT I. INTRODUCTION. Department of Mechanical Engineering, SSJCOE, Asangaon, Maharashtra, India

Namrata Agrawal 1, Santosh Devkare 2 ABSTRACT I. INTRODUCTION. Department of Mechanical Engineering, SSJCOE, Asangaon, Maharashtra, India 2017 IJSRSET Volume 3 Issue 2 Print ISSN: 2395-1990 Online ISSN : 2394-4099 Themed Section: Engineering and Technology FEA Analysis of Two Wheeler Silencer Namrata Agrawal 1, Santosh Devkare 2 1,2 Department

More information

IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 09, 2016 ISSN (online):

IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 09, 2016 ISSN (online): IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 09, 2016 ISSN (online): 2321-0613 Analysis of Muffler Performance of an I.C.Engine by using the Transfer Matrix Method

More information

EVS25. Shenzhen, China, Nov 5-9, 2010

EVS25. Shenzhen, China, Nov 5-9, 2010 Page00053 EVS5 Shenzhen, China, Nov 5-9, 010 Application for Step-sewing of Rotor of IPM Motors Used in EV Hongliang Ying 1, Zhouyun Zhang 1, Jun Gong 1, Surong Huang, Xuanming Ding 1 1 Technique center

More information

CHAPTER 5 ANALYSIS OF COGGING TORQUE

CHAPTER 5 ANALYSIS OF COGGING TORQUE 95 CHAPTER 5 ANALYSIS OF COGGING TORQUE 5.1 INTRODUCTION In modern era of technology, permanent magnet AC and DC motors are widely used in many industrial applications. For such motors, it has been a challenge

More information

Design, Assessment and Optimization of Automotive Muffler

Design, Assessment and Optimization of Automotive Muffler Design, Assessment and Optimization of Automotive Muffler Shubham Naikwad 1, Aditya Salunkhe 2, Mukund Bamane 3, Akash Bhoite 4 U.G. Student, Department of Mechanical Engineering, Sinhgad College of Engineering,

More information

Modeling of 17-DOF Tractor Semi- Trailer Vehicle

Modeling of 17-DOF Tractor Semi- Trailer Vehicle ISSN 2395-1621 Modeling of 17-DOF Tractor Semi- Trailer Vehicle # S. B. Walhekar, #2 D. H. Burande 1 sumitwalhekar@gmail.com 2 dhburande.scoe@sinhgad.edu #12 Mechanical Engineering Department, S.P. Pune

More information

2292. Numerical computation of aerodynamic noises of the high speed train with considering pantographs

2292. Numerical computation of aerodynamic noises of the high speed train with considering pantographs 2292. Numerical computation of aerodynamic noises of the high speed train with considering pantographs Ya-hui Wang 1, Jian-ting Wang 2, Liu-qiang Fu 3 North China University of Water Resources and Electric

More information

FINITE ELEMENT SIMULATION OF SHOT PEENING AND STRESS PEEN FORMING

FINITE ELEMENT SIMULATION OF SHOT PEENING AND STRESS PEEN FORMING FINITE ELEMENT SIMULATION OF SHOT PEENING AND STRESS PEEN FORMING H.Y. Miao 1, C. Perron 1, M. Lévesque 2 1. Aerospace Manufacturing Technology Center, National Research Council Canada,5154 av. Decelles,

More information

Effect of Stator Shape on the Performance of Torque Converter

Effect of Stator Shape on the Performance of Torque Converter 16 th International Conference on AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 16 May 26-28, 2015, E-Mail: asat@mtc.edu.eg Military Technical College, Kobry Elkobbah, Cairo, Egypt Tel : +(202) 24025292

More information

A Study on Performance Enhancement of Heat Exchanger in Thermoelectric Generator using CFD

A Study on Performance Enhancement of Heat Exchanger in Thermoelectric Generator using CFD IJIRST International Journal for Innovative Research in Science & Technology Volume 2 Issue 10 March 2016 ISSN (online): 2349-6010 A Study on Performance Enhancement of Heat Exchanger in Thermoelectric

More information

Experimental Study on Torsional Vibration of Transmission System Under Engine Excitation Xin YANG*, Tie-shan ZHANG and Nan-lin LEI

Experimental Study on Torsional Vibration of Transmission System Under Engine Excitation Xin YANG*, Tie-shan ZHANG and Nan-lin LEI 217 3rd International Conference on Applied Mechanics and Mechanical Automation (AMMA 217) ISBN: 978-1-6595-479- Experimental Study on Torsional Vibration of Transmission System Under Engine Excitation

More information

Dynamic Behavior Analysis of Hydraulic Power Steering Systems

Dynamic Behavior Analysis of Hydraulic Power Steering Systems Dynamic Behavior Analysis of Hydraulic Power Steering Systems Y. TOKUMOTO * *Research & Development Center, Control Devices Development Department Research regarding dynamic modeling of hydraulic power

More information

A LES/RANS HYBRID SIMULATION OF CANOPY FLOWS

A LES/RANS HYBRID SIMULATION OF CANOPY FLOWS BBAA VI International Colloquium on: Bluff Bodies Aerodynamics & Applications Milano, Italy, July, - 8 A ES/RANS HYBRID SIMUATION OF CANOPY FOWS Satoru Iizuka and Hiroaki Kondo Nagoya University Furo-cho,

More information

The spray characteristic of gas-liquid coaxial swirl injector by experiment

The spray characteristic of gas-liquid coaxial swirl injector by experiment The spray characteristic of gas-liquid coaxial swirl injector by experiment Chen Chen 1,2, Yan Zhihui 2, Yang Yang 2, Gao Hongli 1, Yang Shunhua 2 and Zhang Lei 2 1 School of Mechanical Engineering, Southwest

More information

China. Keywords: Electronically controled Braking System, Proportional Relay Valve, Simulation, HIL Test

China. Keywords: Electronically controled Braking System, Proportional Relay Valve, Simulation, HIL Test Applied Mechanics and Materials Online: 2013-10-11 ISSN: 1662-7482, Vol. 437, pp 418-422 doi:10.4028/www.scientific.net/amm.437.418 2013 Trans Tech Publications, Switzerland Simulation and HIL Test for

More information

Optimal design of a double coil magnetorheological fluid damper with various piston profiles

Optimal design of a double coil magnetorheological fluid damper with various piston profiles 11 th World Congress on Structural and Multidisciplinary Optimisation 07 th -12 th, June 2015, Sydney Australia Optimal design of a double coil magnetorheological fluid damper with various piston profiles

More information

Design of A Smart Automotive Ventilation System For A Parked Car

Design of A Smart Automotive Ventilation System For A Parked Car Design of A Smart Automotive Ventilation System For A Parked Car Gaurav Kumar Jaiswal 1, Mohit Gandhi 2, Sanket Phalgaonkar 3, Harshal Upadhyay 4, Ankit Agrawal 5, Vasudevan Rajamohan6, K.Ganesan 7 1,2,3,4,5,6

More information

Load Analysis and Multi Body Dynamics Analysis of Connecting Rod in Single Cylinder 4 Stroke Engine

Load Analysis and Multi Body Dynamics Analysis of Connecting Rod in Single Cylinder 4 Stroke Engine IJSRD - International Journal for Scientific Research & Development Vol. 3, Issue 08, 2015 ISSN (online): 2321-0613 Load Analysis and Multi Body Dynamics Analysis of Connecting Rod in Single Cylinder 4

More information

51. Heat transfer characteristic analysis of negative pressure type EGR valve based on CFD

51. Heat transfer characteristic analysis of negative pressure type EGR valve based on CFD 51. Heat transfer characteristic analysis of negative pressure type EGR valve based on CFD Guannan Hao 1, Sen Zhang 2, Yiguang Yin 3 Binzhou University, Binzhou, China 1 Corresponding author E-mail: 1

More information

Analysis of Exhaust System using AcuSolve

Analysis of Exhaust System using AcuSolve Analysis of Exhaust System using AcuSolve Abbreviations: CFD (Computational Fluid Dynamics), EBP (Exhaust Back Pressure), RANS (Reynolds Averaged Navier Stokes), Spalart Allmaras (SA), UI (Uniformity Index)

More information

Modeling the Lithium-Ion Battery

Modeling the Lithium-Ion Battery Modeling the Lithium-Ion Battery Dr. Andreas Nyman, Intertek Semko Dr. Henrik Ekström, Comsol The term lithium-ion battery refers to an entire family of battery chemistries. The common properties of these

More information