In-cylinder flow and combustion modeling using the OpenFOAM technology
|
|
- Imogene Clark
- 6 years ago
- Views:
Transcription
1 Workshop "HPC enabling of OpenFOAM for CFD applications" In-cylinder flow and combustion modeling using the OpenFOAM technology T. Lucchini, G. Montenegro, G. D Errico, A. Onorati, L. Cornolti Department of Energy, Politecnico di Milano
2 Background Target for next IC engines generation: contemporary reduction of fuel consumption and pollutant emissions. Development and design focused on fuel-air mixing and combustion: GDI engines (premixed or stratified) Diesel engines (complex injection strategies) New combustion modes (HCCI, PCCI) CFD widely used for IC engines design: Development of a platform that can be used both for model implementation and engine design.
3 Topics Development of new combustion models for IC engines using the OpenFOAM technology. Lib-ICE, model development for in-cylinder flow simulations: Mesh management Fuel-air mixing Combustion Examples of application on real engine cases
4 Model implementation: Lib-ICE Libraries and solvers for IC engine simulations based on OpenFOAM technology Mesh motion for engine geometries Combustion (spark-ignition, diesel) Lagrangian sprays + liquid film Unsteady flows in intake and exhaust systems: Plenums, silencers, 1D-3D coupling Reacting flows in after-treatment devices DPF, SCR, catalyst
5 Lib-ICE code structure OpenFOAM-2.0.x Lib-ICE src Spray Thermo-physical models Combustion models Liquid film Engine mesh management Boundary conditions 1D-3D coupling solvers Cold-flow Diesel Spark-ignition Combustion Spray utilities Pre-processing Parallel-processing Post-processing Mesh-management
6 MESH MANAGEMENT
7 Full-cycle simulation XXX CA MESH 1 YYY CA 1) Multiple meshes cover the entire cycle simulation. 2) Each mesh is valid in a userspecified interval. 3) During each time-step: Grid points are moved using automatic mesh motion and/or pre-defined points motion. Mesh topology can be eventually changed YYY CA MESH 2 ZZZ CA 4) Mesh-to-mesh interpolation.
8 Full-cycle simulation Automatic mesh motion Grid points motion computed by an automatic mesh motion solver, based on the Laplace equation. x 2 u 0 new x old ut Layout for deforming mesh simulations
9 Full-cycle simulation Topological changes Reduction of the overall number of meshes. Mesh is modified according to user-defined parameters, no need to specify exactly when a specific event should take place. Dynamic mesh layering Sliding interface
10 Full-cycle simulation Topological changes: Adaptive Local Mesh Refinement Grid resolution increased to properly describe the most important physical and chemical processes and reduce grid dependency: Fuel-air mixing Combustion
11 Mesh management engine library in Lib-ICE engine enginetopochangermesh fvmotionenginemesh pistonlayerarenginemesh twostrokeenginemesh pistonrefineenginemesh multicycleenginetime Deforming grid for full-cycle simulations in four-stroke engines Compression-expansion with dynamic mesh layering Full-cycle simulation in four-stroke engines Compression-expansion with adaptive local mesh refinement
12 Full-cycle simulation Specific utilities for case set-up 1) Generation of multiple meshes 2) Definition of a template case 3) enginecasesetup utility case case0300 constant case0320 dataoutput init case0720 system case1440 5) Post-processing 4) runmulticyclecase solvername simplecoldspeciesenginedymfoam; starttimes (/* list of starttime for each mesh */); endtimes (/* list of endtimes for each mesh */); writeinterval (/* list of writeinterval for each mesh */); parallelrun on;
13 Grid imported from different tools (Gambit, ICEM- CFD, Pointwise, STAR-CD ) Full-cycle simulation Generation of engine meshes Fully automatic hexahedral mesh generation from stl file
14 Full-cycle simulation Mesh generation: new approach based on Blender Blender + snappyhexmesh: engine mesh generation exclusively based on open-source tools
15 Full-cycle simulation SANDIA Hydrogen Engine (data from ECN) Displaced volume 560 cm 3 Compression ratio 11 Intake pressure/temperature 1 bar / 36 C Engine speed 1500 rpm Motored conditions. Experimental pressure and temperature profiles imposed at intake and exhaust ports. Hydrogen injector Cylinder head Exhaust Intake Tumble plate Fixed zones Mesh validity: 15 deg each. Average cell size ranging from 300 to 600 thousand. Grid size: Cylinder: 2.5 mm Valve region: 0.75 mm Ducts: mm Laser 532/266 nm Piston Optical liner Engine block Deforming zones Turbulence model: standard k-e
16 Full-cycle simulation SANDIA Engine: velocity field comparison Exp. Calc CA (IVC: -140) The main flow features at BDC are almost preserved at this time, when the intake valve is closing.
17 Full-cycle simulation SANDIA Engine: velocity field comparison Exp. Calc. -70 CA (IVC: -140) Gas pressure now higher than ambient pressure. Still rather good agreement between computed and experimental data.
18 Full-cycle simulation Post-processing Specific utilities to estimate relevant quantities: charge motions (tumble, swirl ratio, turbulence intensity); air-fuel mixing: homogeneity index. Cylinder pressure In-cylinder charge motions IVC SOI EOI Tumble ratio Turb. Kin. energy Crank Angle [deg] 0
19 SPRAY AND WALL FILM
20 Spray model Comprehensive spray model for Diesel and GDI sprays Turbulence induced breakup Breakup transition: Weber number. Wave + Catastrophic breakup
21 Extending the capabilities of the standard OpenFOAM spray library, by introducing new models for: High pressure injection Liquid fuel atomization Droplet-wall interaction Liquid evaporation Spray model Comprehensive spray model for Diesel and GDI sprays Reducing the grid-dependency and CPU time of spray simulations: Easy development of new models. Fast tuning of existing models.
22 dieselspray Mesh management dieselspray library in Lib-ICE spray parcel Partially re-implemented Fully re-implemented spraysubmodels injectormodel atomizationmodel wallmodel Huh model with and without cavitation Huh-Gosman model Bai-Gosman model breakupmodel Bug fixes
23 Approach proposed by Bai and Gosman (SAE ). Liquid film model Mass, momentum and energy equations solved for a thin film using the Finite Area Method accounting for both interaction with liquid (impact) and gas phase (evaporation). Liquid film
24 Spray model Non-evaporating diesel spray Experimental data courtesy of Dr. Montanaro and Dr. Allocca (CNR-Istituto Motori)
25 Spray model Evaporating diesel spray (ECN data) Fuel: n-dodecane ( Spray-A ) Effects of ambient conditions (temperature, density) on liquid and vapor penetration. Exp data from ECN:
26 Distance [mm] Spray model Evaporating diesel spray (ECN data) Fuel: n-heptane (Spray-H) Air/fuel mixing and velocity comparison (a) (b) (c) 20 Calc. Exp Comprehensive spray model validation absolutely necessary for a correct prediction of the combustion process. Exp data from ECN:
27 Impinging gasoline spray Spray model Liquid film formation on the plate (a) t = 400 μs (b) t = 2300 μs Experimental data courtesy of Dr. Montanaro and Dr. Allocca (CNR-Istituto Motori)
28 COMBUSTION MODELS
29 Background Combustion models for IC engines. Requirements: Flexibility multiple-injections stratified charge combustion different combustion regimes Detailed chemistry pollutant formation (soot) auto-ignition multi-component fuels Interacting processes Energy transfer during spark-ignition Turbulence-chemistry interaction
30 Background Implementation of combustion models in Lib-ICE Design-oriented tools: Fast, robust and suitable for industrial simulations Reduced chemistry Diagnostic-oriented tools: Allowing a detailed analysis of the flame structure and study of new combustion modes Detailed kinetics
31 COMBUSTION MODELS Spark-ignition
32 Combustion models for SI Engines Combustion phases: spark-ignition and turbulent combustion. State of the art: different combustion models available (G-Equation, Weller, ECFM) and extensively validated. However, initial flame development plays a big role and modeling efforts are still required to describe such phase. Influence of local flow, turbulence conditions and energy transfer from the electrical circuit to be accounted for. Proposed approach: Lagrangian ignition model + turbulent combustion model (Eulerian)
33 Combustion models for SI Engines Lagrangian ignition model 1) The spark channel is represented by a set of Lagrangian particles, convected by the mean flow.
34 Combustion models for SI Engines Lagrangian ignition model 2) Flame kernels are launched at the particle locations satisfying the ignition criterion (Karlovitz). For each particle mass and energy equations are solved. Ka Ka dm dt p p dtp mp 4r pu st s plasma Tp Tb u dt m p Q m p c spk p, p
35 Combustion models for SI Engines Lagrangian ignition model 3) Flame surface density distribution reconstructed from particle distribution and their size. spk N f i1 V i cell S i
36 a [m 2 /s] c p [kj/jkgk] Combustion models for SI Engines Lagrangian ignition model 4) Initial thermal transient of the plasma channel correctly described by solving the heat conduction equation on it. Q el r i T i (>10000 K) T u ( K) Temperature [K] Tpl 2 Qel 2 a Tpl a t c pvpl T Temperature [K] pl V c t it p V pl
37 Combustion models for SI Engines Lagrangian ignition model 5) Simplified model for the secondary circuit to estimate the amount of energy transferred to the gas phase R p R s L p L s Spark gap de dt is V s Q s t R t V V l spk V 2E L ac s i s s s t it 2 t V t i t gc spk s s
38 Combustion models for SI Engines Lagrangian ignition model 6) Ignition source term included in the flame surface density transport equation: t ui x i x i Sc t Sc t xi P D Possibility to choose different expressions for P and D depending on the selected FSD approach. P k
39 Combustion models for SI Engines sparkignition library in Lib-ICE flamekernelignition flamekernel Cloud<flameKernel> particle electricalcircuit plasmachannelmodel regionmodel sparkignitionsubmodels ignition, restrike, wall, dispersion, efficiency flamesurfacedensitymodels CFM, ECFM, CFM-2, Chang-Huh,.. Solver: lagrangianplasmaflamekernelenginefoam
40 Combustion models for SI Engines Experimental validation: optical pre-chamber engine Pre-chamber with optical access. Fuel: propane; laminar flame speed: Gulder Tested operating conditions: 1) Effect of engine speed 2) Effect of air/fuel ratio 3) Effect of spark-plug position Grid generation: snappyhexmesh Engine geometry details, operating conditions and complete set of experimental data available in SAE Paper
41 non-dimensional ratio Combustion models for SI Engines Experimental validation: optical pre-chamber engine Non-combusting conditions Ignition locations Calc. Exp. 8 4 u'/u p U mean /u p Crank Angle [deg] velocity Turbulence intensity Correct prediction of turbulence intensity and velocity very important for realistic simulation of the combustion process
42 Combustion models for SI Engines Experimental validation: optical pre-chamber engine Computed vs experimental burned volume Effect of air/fuel ratio at 1000 rpm Effect of engine speed
43 COMBUSTION MODELS Diesel
44 Complex process involving: Diesel combustion Detailed fuel chemistry (auto-ignition, pollutant formation) Spray evolution Multi-component fuels Turbulence-chemistry interaction Implemented approaches: CTC (reduced chemistry) Well-mixed model (detailed chemistry) Flamelet-combustion models (detailed chemistry)
45 Diesel combustion: CTC model 11 chemical species (fuel, O 2, N 2, CO, CO 2, H 2 O, O, OH, NO, H, H 2 ) Auto-ignition computed by the Shell auto-ignition model; turbulent combustion simulated accounting for both laminar and turbulent time scales: Characteristic time-scale combustion model, 1 ayi CTC Y i a Yi Shell, Temperature threshold to switch between auto-ignition (a=1) and turbulent combustion (a=0).
46 Diesel combustion: CTC model Validation: passenger-car, common-rail engine Bore Stroke 85 mm 88 mm Compression ratio ~15 Operating conditions: Full load with post-injection to reduce soot Medium high load with: Models: Variable EGR rate Three injection events (pre, main, post) Modified Huh-Gosman for atomization. Diesel fuel approximated as C 12 H 26 CTC+Shell for combustion. C 12 H 26 Shell-model constants proposed by Reitz.
47 Full load, single injection, No EGR Diesel combustion: CTC model Cylinder pressure validation at full load 100% 0% EGR Qpil Qmain Qpost
48 Non dimensional soot Diesel combustion: CTC model Soot emissions, full load Post-injection effect on soot emissions Effect of post injection on soot-emissions 1 Measured Computed Mass of fuel in the post-injection [mg/stroke]
49 Diesel combustion: CTC model Cylinder pressure validation at mid-load Mediumhigh load, 0% EGR 3 injections 2300 rpm imep = 10.5 bar 100% 0% EGR Qpil Qmain Qpost
50 Diesel combustion: CTC model Cylinder pressure validation at mid-load Mediumhigh load, 34% EGR 3 injections 2300 rpm imep = 10.5 bar 100% 0% EGR Qpil Qmain Qpost
51 Non-dimensional soot NO x [ppm] Diesel combustion: CTC model Soot emissions, medium-high load Injection strategy and external EGR effects on soot and NO x emissions Measured Computed Measured Computed (std.) 33.5 (adv.) (std.) 33.5 (adv.) External EGR [%] External EGR [%]
52 Diesel combustion: well-mixed model Direct integration of complex chemistry in each computational cell. Each cell is an homogeneous reactor and species reaction rates are computed by means of an ODE stiff solver: Y * i tt t t Y i t t i Wi dt' Y i Y * i t ty t t i Detailed approach but very time-consuming, mainly when a realistic mechanism (>50 species) is employed.
53 Diesel combustion: TDAC TDAC: Tabulation of Dynamic Adaptive Chemistry Combination of mechanism reduction and tabulation techniques Work developed in collaboration with Dr. F. Contino (Vrije Universiteit Brussel) and Prof. H. Jeanmart (Univ. of Louvain) CPU time speed-up compared to direct-integration is of the order of n x m (n: number of species, m: number of reactions). Very general approach, flexible with respect to the mechanism and fuel composition. Up to 300 species and 1000 reactions can be used in a reasonable amount of time.
54 Combustion models for SI Engines chemistrymodelpolimi library in Lib-ICE chemistrymodelpolimi chemistrymodel chemistrysolverstdac Developed in collaboration with Dr. F. Contino and Prof. H. Jeanmart. mechanismreduction tabulation DAC, DRG, DRGEP,.. ISAT Solvers: dieselfoamautorefine, dieselenginedymfoam
55 Diesel combustion: well-mixed model Auto-ignition and flame lift-off in SANDIA ECN Spray-A Diesel flame 103 species, 370 reactions mechanism for C 12 H 26 (Sarathi et al.) Effects of oxygen concentration and ambient temperature: IGN. DELAY
56 Diesel combustion: well-mixed model Auto-ignition and flame lift-off in SANDIA ECN Spray-A Diesel flame 103 species, 370 reactions mechanism for C 12 H 26 (Sarathi et al.) Effects of oxygen concentration and ambient temperature: LIFT-OFF
57 Diesel combustion: well-mixed model Flame structure in the SANDIA ECN Spray-A Diesel flame Temperature OH Acetylene BIN1-A 300 species, 8900 reactions mechanism for C 12 H 26 (Ranzi et al.)
58 Diesel combustion: well-mixed model PCCI combustion in an optical engine Air-fuel mixing model validation PRF30 fueled engine: ALMR employed to better predict both the fuel-air mixing process and flame propagation. Detailed mechanism for PRF fuels oxidation Combustion model validation 7 mm, exp 12 mm, exp 18 mm, exp 7 mm, calc 12 mm, calc 18 mm, calc
59 Diesel combustion: unsteady flamelets Detailed chemistry and turbulence-chemistry interaction Multiple unsteady flamelets: a set of unsteady diffusion flames represents Diesel combustion. First model towards the definition of a generic model for partially-premixed combustion CFD Code ~, st p ~ Z '' 2 x, Z ~ ~ x ~ H x h Y x i i T H ~ x x ~ Y ~ Y i Z, t 1 ~ x, t f ; x, ty td ~ i z i, 0 Flamelet Code Flamelet Equations h t Y t s i Z 2 2 Z 2 Y Z 2 h Z s 2 i 2 Y q chem
60 Diesel combustion: unsteady flamelets Detailed chemistry and turbulence-chemistry interaction CFD domain: transport equations are solved for mixture fraction Z and variance Z 2, momentum, mass, enthalpy h. Flamelet domain takes the average scalar dissipation rate conditioned on the stoichiometric mixture fraction ( st ) and use it in the flamelet equations for mass and energy in the mixture fraction space. Possibility to use multiple flamelets, with two possible criteria for division: mass or scalar dissipation rate. 1 Chemical composition in CFD cells: Y x I x Y Z pz i N f 1 f 0 i, f dz
61 Diesel combustion: unsteady flamelets Implementation of a flamelet combustion model Use of any pre-implemented capability to exploit the entire potentialities that are offered by the OpenFOAM technology: Chemistry model + in-house developments (ISAT, DAC, ) Thermodynamics Parallelization using existing domain decomposition techniques. Pre-implemented functions (average, integration, matrix algebra ) to solve flamelet equations and to exchange data between the phase space and the physical domain.
62 Diesel combustion: unsteady flamelets Implementation of a flamelet combustion model regionmodel approach for flamelet combustion models: Flamelet mesh, representing the Z space Flamelet equations (species and enthalpy) solved on the flamelet mesh, relying on native OpenFOAM matrix algebra and ODE solvers. PDF averaging: Standard OpenFOAM functions (integration, averaging) applied on the flamelet mesh, that requires accurate grading at the Z = 0 and Z = 1 boundaries.
63 Diesel combustion: unsteady flamelets flameletcombustionmodels library in Lib-ICE flameletcombustionmodels flameletcombustionmodel RIF Abstract class Implementation of Representative Interactive Flamelet Model scalardissipationrate scalardissipationrate Peters Operations to compute scalar dissipation rate ( st, (Z)) pdffunctions Solver: RIFdieselFoam
64 Diesel combustion: unsteady flamelets Simulation: SANDIA ECN Spray H flame (n-heptane) Flamelet mesh 0 z 1 The grid is refined at the boundaries (Z=0, Z=1), to correctly integrate the PDF function in presence of high mixture fraction variances, as suggested by Liu et al.
65 Diesel combustion: unsteady flamelets Simulation: SANDIA ECN Spray H flame (n-heptane) Flamelet mesh Initial conditions in the flamelet domain: Temperature in Z-domain Species in the Z-domain Temperature in Z-domain Species
66 Diesel combustion: unsteady flamelets Simulation: SANDIA ECN Spray H flame (n-heptane) Flamelet mesh Scalar dissipation rate Cool flame Temperature in Z-domain Species
67 Diesel combustion: unsteady flamelets Simulation: SANDIA ECN Spray H flame (n-heptane) Flamelet mesh Scalar dissipation rate Main ignition Temperature in Z-domain Species
68 Diesel combustion: unsteady flamelets Simulation: SANDIA ECN Spray H flame (n-heptane) t = 0.9 ms Flame structure in CFD domain computed at steady state conditions Mixture fraction Stoichiometric scalar dissipation rate Mixture fraction variance Temperature
69 Ignition delay [ms] Ignition delay [ms] Diesel combustion: unsteady flamelets Simulation: SANDIA ECN Spray H flame (n-heptane) Calc. Exp Calc. Exp. 1 amb = 14.8 kg/m amb = 30 kg/m Oxygen concentration [%] Ambient temperature T [K]
70 Acknowledgments Ing. Rita Di Gioia, Ing. Giovanni Bonandrini, Ing. Mario Picerno, Ing. Luca Venturoli, Magneti Marelli, Bologna. Dr. Francesco Contino, Vrije Universiteit Brussel. Ing. Marco Fiocco, Politecnico di Milano. Paolo Colombi, MSc. Student, Politecnico di Milano Dr. Luigi Allocca, Dr. Alessandro Montanaro, CNR- Istituto Motori
71 Thanks for your attention!
Lib-ICE A C++ object-oriented library for internal combustion engine simulations: spray and combustion modeling
5 th OpenFOAM Workshop, Goteborg, 21-24 June 2010 Lib-ICE A C++ object-oriented library for internal combustion engine simulations: spray and combustion modeling T. Lucchini, G. D Errico, D. Ettorre, E.
More informationSimulation of gas exchange and combustion processes in SI and Diesel engines: current state of models and examples of applications
Simulation of gas exchange and combustion processes in SI and Diesel engines: current state of models and examples of applications T. Lucchini, G. D Errico, D. Ettorre, M. Fiocco Department of Energy,
More informationGas exchange and fuel-air mixing simulations in a turbocharged gasoline engine with high compression ratio and VVA system
Third Two-Day Meeting on Internal Combustion Engine Simulations Using the OpenFOAM technology, Milan 22 nd -23 rd February 2018. Gas exchange and fuel-air mixing simulations in a turbocharged gasoline
More informationIn-cylinder flows and combustion modeling: application and validation to real and enginelike configurations
Second Two-Day Meeting on Internal Combustion Engine Simulations Using the OpenFOAM technology, Milan 26-27 th November 216. In-cylinder flows and combustion modeling: application and validation to real
More informationMarc ZELLAT, Driss ABOURI, Thierry CONTE and Riyad HECHAICHI CD-adapco
16 th International Multidimensional Engine User s Meeting at the SAE Congress 2006,April,06,2006 Detroit, MI RECENT ADVANCES IN SI ENGINE MODELING: A NEW MODEL FOR SPARK AND KNOCK USING A DETAILED CHEMISTRY
More informationIncorporation of Flamelet Generated Manifold Combustion Closure to OpenFOAM and Lib-ICE
Multiphase and Reactive Flows Group 3 rd Two-day Meeting on IC Engine Simulations Using OpenFOAM Technology 22-23 Feb 2018 - Milano Incorporation of Flamelet Generated Manifold Combustion Closure to OpenFOAM
More informationMarc ZELLAT, Driss ABOURI and Stefano DURANTI CD-adapco
17 th International Multidimensional Engine User s Meeting at the SAE Congress 2007,April,15,2007 Detroit, MI RECENT ADVANCES IN DIESEL COMBUSTION MODELING: THE ECFM- CLEH COMBUSTION MODEL: A NEW CAPABILITY
More informationEmissions predictions for Diesel engines based on chemistry tabulation
Emissions predictions for Diesel engines based on chemistry tabulation C. Meijer, F.A. Tap AVL Dacolt BV (The Netherlands) M. Tvrdojevic, P. Priesching AVL List GmbH (Austria) 1. Introduction It is generally
More informationFoundations of Thermodynamics and Chemistry. 1 Introduction Preface Model-Building Simulation... 5 References...
Contents Part I Foundations of Thermodynamics and Chemistry 1 Introduction... 3 1.1 Preface.... 3 1.2 Model-Building... 3 1.3 Simulation... 5 References..... 8 2 Reciprocating Engines... 9 2.1 Energy Conversion...
More informationLES of Spray Combustion using Flamelet Generated Manifolds
LES of Spray Combustion using Flamelet Generated Manifolds Armin Wehrfritz, Ville Vuorinen, Ossi Kaario and Martti Larmi armin.wehrfritz@aalto.fi Aalto University Thermodynamics and Combustion technology
More informationModelling Combustion in DI-SI using the G-equation Method and Detailed Chemistry: Emissions and knock. M.Zellat, D.Abouri, Y.Liang, C.
Modelling Combustion in DI-SI using the G-equation Method and Detailed Chemistry: Emissions and knock Realize innovation. M.Zellat, D.Abouri, Y.Liang, C.Kralj Main topics of the presentation 1. Context
More informationEFFECT OF INJECTION ORIENTATION ON EXHAUST EMISSIONS IN A DI DIESEL ENGINE: THROUGH CFD SIMULATION
EFFECT OF INJECTION ORIENTATION ON EXHAUST EMISSIONS IN A DI DIESEL ENGINE: THROUGH CFD SIMULATION *P. Manoj Kumar 1, V. Pandurangadu 2, V.V. Pratibha Bharathi 3 and V.V. Naga Deepthi 4 1 Department of
More informationSystem Simulation for Aftertreatment. LES for Engines
System Simulation for Aftertreatment LES for Engines Christopher Rutland Engine Research Center University of Wisconsin-Madison Acknowledgements General Motors Research & Development Caterpillar, Inc.
More informationRecent Advances in DI-Diesel Combustion Modeling in AVL FIRE A Validation Study
International Multidimensional Engine Modeling User s Group Meeting at the SAE Congress April 15, 2007 Detroit, MI Recent Advances in DI-Diesel Combustion Modeling in AVL FIRE A Validation Study R. Tatschl,
More informationDual Fuel Engine Charge Motion & Combustion Study
Dual Fuel Engine Charge Motion & Combustion Study STAR-Global-Conference March 06-08, 2017 Berlin Kamlesh Ghael, Prof. Dr. Sebastian Kaiser (IVG-RF), M. Sc. Felix Rosenthal (IFKM-KIT) Introduction: Operation
More informationModeling Constant Volume Chamber Combustion at Diesel Engine Condition
Modeling Constant Volume Chamber Combustion at Diesel Engine Condition Z. Hu, R.Cracknell*, L.M.T. Somers Combustion Technology Department of Mechanical Engineering Eindhoven University of Technology *Shell
More informationCrankcase scavenging.
Software for engine simulation and optimization www.diesel-rk.bmstu.ru The full cycle thermodynamic engine simulation software DIESEL-RK is designed for simulating and optimizing working processes of two-
More informationOverview & Perspectives for Internal Combustion Engine using STAR-CD. Marc ZELLAT
Overview & Perspectives for Internal Combustion Engine using STAR-CD Marc ZELLAT TOPICS Quick overview of ECFM family models Examples of validation for Diesel and SI-GDI engines Introduction to multi-component
More informationCombustion PVM-MF. The PVM-MF model has been enhanced particularly for dualfuel
Contents Extensive new capabilities available in STAR-CD/es-ice v4.20 Combustion Models see Marc Zellat presentation Spray Models LES New Physics Developments in v4.22 Combustion Models PVM-MF Crank-angle
More informationPDF-based simulations of in-cylinder combustion in a compression-ignition engine
Paper # 070IC-0192 Topic: Internal Combustion Engines 8 th US National Combustion Meeting Organized by the Western States Section of the Combustion Institute and hosted by the University of Utah May 19-22,
More informationRecent enhancement to SI-ICE combustion models: Application to stratified combustion under large EGR rate and lean burn
Recent enhancement to SI-ICE combustion models: Application to stratified combustion under large EGR rate and lean burn G. Desoutter, A. Desportes, J. Hira, D. Abouri, K.Oberhumer, M. Zellat* TOPICS Introduction
More informationIC Engines Roadmap. STAR-CD/es-ice v4.18 and Beyond. Richard Johns
IC Engines Roadmap STAR-CD/es-ice v4.18 and Beyond Richard Johns Strategy es-ice v4.18 2D Automated Template Meshing Spray-adapted Meshing Physics STAR-CD v4.18 Contents Sprays: ELSA Spray-Wall Impingement
More informationCFD Combustion Models for IC Engines. Rolf D. Reitz
CFD Combustion Models for IC Engines Rolf D. Reitz Engine Research Center University of Wisconsin-Madison ERC Symposium, June 7, 27 http://www.cae.wisc.edu/~reitz Combustion and Emission Models at the
More informationValidation and Verification of ANSYS Internal Combustion Engine Software. Martin Kuntz, ANSYS, Inc.
Validation and Verification of ANSYS Internal Combustion Engine Software Martin Kuntz, ANSYS, Inc. Contents Definitions Internal Combustion Engines Demonstration example Validation & verification Spray
More informationOPTICAL ANALYSIS OF A GDI SPRAY WALL-IMPINGEMENT FOR S.I. ENGINES. Istituto Motori CNR, Napoli Italy
OPTICAL ANALYSIS OF A GDI SPRAY WALL-IMPINGEMENT FOR S.I. ENGINES A. Montanaro, L. Allocca, S. Alfuso Istituto Motori CNR, Napoli Italy XV National Meeting, Milano 29-30 Novembre 2007 GENERAL CONSIDERATIONS
More informationFigure 1: The spray of a direct-injecting four-stroke diesel engine
MIXTURE FORMATION AND COMBUSTION IN CI AND SI ENGINES 7.0 Mixture Formation in Diesel Engines Diesel engines can be operated both in the two-stroke and four-stroke process. Diesel engines that run at high
More informationIn-Cylinder Engine Calculations: New Features and Upcoming Capabilities Richard Johns & Gerald Schmidt
In-Cylinder Engine Calculations: New Features and Upcoming Capabilities Richard Johns & Gerald Schmidt Contents Brief Review of STAR-CD/es-ice v4.20 Combustion Models Spray Models LES New Physics Developments
More informationEvolution of Particle Size Distribution within the Engine Exhaust and Aftertreatment System
Evolution of Particle Size Distribution within the Engine Exhaust and Aftertreatment System A. J. Smallbone (1, 2), D. Z. Y. Tay (2), W. L. Heng (2), S. Mosbach (2), A. York (2,3), M. Kraft (2) (1) cmcl
More informationRapid Meshing and Advanced Physical Modeling for Gasoline DI Engine Application
Rapid Meshing and Advanced Physical Modeling for Gasoline DI Engine Application R. Tatschl, H. Riediger, Ch. v. Künsberg Sarre, N. Putz and F. Kickinger AVL LIST GmbH A-8020 Graz AUSTRIA Gasoline direct
More informationINFLUENCE OF THE NUMBER OF NOZZLE HOLES ON THE UNBURNED FUEL IN DIESEL ENGINE
INFLUENCE OF THE NUMBER OF NOZZLE HOLES ON THE UNBURNED FUEL IN DIESEL ENGINE 1. UNIVERSITY OF RUSE, 8, STUDENTSKA STR., 7017 RUSE, BULGARIA 1. Simeon ILIEV ABSTRACT: The objective of this paper is to
More informationNumerical Study on the Combustion and Emission Characteristics of Different Biodiesel Fuel Feedstocks and Blends Using OpenFOAM
Numerical Study on the Combustion and Emission Characteristics of Different Biodiesel Fuel Feedstocks and Blends Using OpenFOAM Harun M. Ismail 1, Xinwei Cheng 1, Hoon Kiat Ng 1, Suyin Gan 1 and Tommaso
More informationInternational Multidimensional Engine Modeling User s Group Meeting April 7, 2014, Detroit, Michigan, USA
International Multidimensional Engine Modeling User s Group Meeting April 7, 24, Detroit, Michigan, USA An extended CMC model for the simulation of diesel engines with multiple injections Michele Bolla,
More informationSimulation of the Mixture Preparation for an SI Engine using Multi-Component Fuels
ICE Workshop, STAR Global Conference 2012 March 19-21 2012, Amsterdam Simulation of the Mixture Preparation for an SI Engine using Multi-Component Fuels Michael Heiss, Thomas Lauer Content Introduction
More informationProposal to establish a laboratory for combustion studies
Proposal to establish a laboratory for combustion studies Jayr de Amorim Filho Brazilian Bioethanol Science and Technology Laboratory SCRE Single Cylinder Research Engine Laboratory OUTLINE Requirements,
More informationDARS FUEL MODEL DEVELOPMENT
DARS FUEL MODEL DEVELOPMENT DARS Products (names valid since October 2012) DARS 0D & 1D tools Old name: DARS Basic DARS Reactive Flow Models tools for 3D/ CFD calculations DARS Fuel New! Advanced fuel
More informationUniversità degli Studi di Roma Tor Vergata Modeling Combustion of Methane- Hydrogen Blends in Internal Combustion Engines (BONG-HY)
Università degli Studi di Roma Tor Vergata Modeling Combustion of Methane- Hydrogen Blends in Internal Combustion Engines (BONG-HY) Prof. Stefano Cordiner Ing. Vincenzo Mulone Ing. Riccardo Scarcelli Index
More informationIntroduction to combustion
Introduction to combustion EEN-E005 Bioenergy 1 017 D.Sc (Tech) ssi Kaario Motivation Why learn about combustion? Most of the energy in the world, 70-80%, is produced from different kinds of combustion
More informationCFD Simulation of Dry Low Nox Turbogas Combustion System
CFD Simulation of Dry Low Nox Turbogas Combustion System L. Bucchieri - Engin Soft F. Turrini - Fiat Avio CFX Users Conference - Friedrichshafen June 1999 1 Objectives Develop a CFD model for turbogas
More informationModule7:Advanced Combustion Systems and Alternative Powerplants Lecture 32:Stratified Charge Engines
ADVANCED COMBUSTION SYSTEMS AND ALTERNATIVE POWERPLANTS The Lecture Contains: DIRECT INJECTION STRATIFIED CHARGE (DISC) ENGINES Historical Overview Potential Advantages of DISC Engines DISC Engine Combustion
More informationNormal vs Abnormal Combustion in SI engine. SI Combustion. Turbulent Combustion
Turbulent Combustion The motion of the charge in the engine cylinder is always turbulent, when it is reached by the flame front. The charge motion is usually composed by large vortexes, whose length scales
More informationTHE USE OF Φ-T MAPS FOR SOOT PREDICTION IN ENGINE MODELING
THE USE OF ΦT MAPS FOR SOOT PREDICTION IN ENGINE MODELING Arturo de Risi, Teresa Donateo, Domenico Laforgia Università di Lecce Dipartimento di Ingegneria dell Innovazione, 731 via Arnesano, Lecce Italy
More informationPOSIBILITIES TO IMPROVED HOMOGENEOUS CHARGE IN INTERNAL COMBUSTION ENGINES, USING C.F.D. PROGRAM
POSIBILITIES TO IMPROVED HOMOGENEOUS CHARGE IN INTERNAL COMBUSTION ENGINES, USING C.F.D. PROGRAM Alexandru-Bogdan Muntean *, Anghel,Chiru, Ruxandra-Cristina (Dica) Stanescu, Cristian Soimaru Transilvania
More informationMarc ZELLAT, Driss ABOURI, Thierry CONTE. CD-adapco Group
Advanced modeling of DI Diesel Engines: Investigations on Combustion, High EGR level and multipleinjection Application to DI Diesel Combustion Optimization Marc ZELLAT, Driss ABOURI, Thierry CONTE CD-adapco
More informationComparison of Velocity Vector Components in a Di Diesel Engine: Analysis through Cfd Simulation
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-issn: 2278-1684,p-ISSN: 2320-334X PP. 55-60 www.iosrjournals.org Comparison of Velocity Vector Components in a Di Diesel Engine: Analysis
More informationCombustion calibration in a Methane port fuel injection engine with the STAR-CD ISSIM embedding the ECFM-3Z model
Prague Czech Republic March 7-9, 2016 Combustion calibration in a Methane port fuel injection engine with the STAR-CD ISSIM embedding the ECFM-3Z model INDEX 1. PROBLEM PROPOSED 2. ANALYTICAL & NUMERICAL
More informationA comprehensive methodology for computational fluid dynamics combustion modeling of industrial diesel engines
Special Issue Article A comprehensive methodology for computational fluid dynamics combustion modeling of industrial diesel engines International J of Engine Research 2017, Vol. 18(1-2) 26 38 Ó IMechE
More informationNumerical Investigation of the Influence of different Valve Seat Geometries on the In-Cylinder Flow and Combustion in Spark Ignition Engines
Institute for Combustion and Gas Dynamics Fluid Dynamics Numerical Investigation of the Influence of different Valve Seat Geometries on the In-Cylinder Flow and Combustion in Spark Ignition Engines Peter
More informationSI engine combustion
SI engine combustion 1 SI engine combustion: How to burn things? Reactants Products Premixed Homogeneous reaction Not limited by transport process Fast/slow reactions compared with other time scale of
More informationIntegrated 1D-MultiD Fluid Dynamic Models for the Simulation of I.C.E. Intake and Exhaust Systems
Integrated -MultiD Fluid Dynamic Models for the Simulation of I.C.E. Intake and Exhaust Systems G. Montenegro, A. Onorati, F. Piscaglia, G. D Errico Politecnico di Milano, Dipartimento di Energetica, Italy
More informationFlow Simulation of Diesel Engine for Prolate Combustion Chamber
IJIRST National Conference on Recent Advancements in Mechanical Engineering (RAME 17) March 2017 Flow Simulation of Diesel Engine for Prolate Combustion Chamber R.Krishnakumar 1 P.Duraimurugan 2 M.Magudeswaran
More informationUniv.-Prof. Dr.-Ing. Heinz Pitsch Mathis Bode, Tobias Falkenstein, Jörn Hinrichs, Marco Davidovic, Liming Cai, Vincent Le Chenadec
LES of Diesel Sprays Using Advanced Computational Methods and Models for Mixture and Emission Formation Univ.-Prof. Dr.-Ing. Heinz Pitsch Mathis Bode, Tobias Falkenstein, Jörn Hinrichs, Marco Davidovic,
More informationInfluence of ANSYS FLUENT on Gas Engine Modeling
Influence of ANSYS FLUENT on Gas Engine Modeling George Martinas, Ovidiu Sorin Cupsa 1, Nicolae Buzbuchi, Andreea Arsenie 2 1 CERONAV 2 Constanta Maritime University Romania georgemartinas@ceronav.ro,
More informationDevelopment of a two-dimensional internal combustion engines model using CFD for education purpose
20th International Congress on Modelling and Simulation, Adelaide, Australia, 1 6 December 2013 www.mssanz.org.au/modsim2013 Development of a two-dimensional internal combustion engines model using CFD
More informationTowards a Universal Combustion Model in STAR-CD for IC Engines: From GDI to HCCI and Application to DI Diesel Combustion Optimization
Towards a Universal Combustion Model in STAR-CD for IC Engines: From GDI to HCCI and Application to DI Diesel Combustion Optimization Marc ZELLAT*, Stefano DURANTI, YongJun LIANG, Cedomir KRALJ and Gerald
More informationModel validation of the SI test engine
TEKA. COMMISSION OF MOTORIZATION AND ENERGETICS IN AGRICULTURE 2013, Vol. 13, No. 2, 17 22 Model validation of the SI test engine Arkadiusz Jamrozik Institute of Thermal Machinery, Czestochowa University
More informationNumerical Investigation of the Effect of Excess Air and Thermal Power Variation in a Liquid Fuelled Boiler
Proceedings of the World Congress on Momentum, Heat and Mass Transfer (MHMT 16) Prague, Czech Republic April 4 5, 2016 Paper No. CSP 105 DOI: 10.11159/csp16.105 Numerical Investigation of the Effect of
More informationTHE THEORETICAL STUDY ON INFLUENCE OF FUEL INJECTION PRESSURE ON COMBUSTION PARAMETERS OF THE MARINE 4-STROKE ENGINE
Journal of KONES Powertrain and Transport, Vol. 23, No. 1 2016 THE THEORETICAL STUDY ON INFLUENCE OF FUEL INJECTION PRESSURE ON COMBUSTION PARAMETERS OF THE MARINE 4-STROKE ENGINE Jerzy Kowalski Gdynia
More informationNumerically Analysing the Effect of EGR on Emissions of DI Diesel Engine Having Toroidal Combustion Chamber Geometry
Numerically Analysing the Effect of EGR on Emissions of DI Diesel Engine Having Toroidal Combustion Chamber Geometry Jibin Alex 1, Biju Cherian Abraham 2 1 Student, Dept. of Mechanical Engineering, M A
More informationEffects of Dilution Flow Balance and Double-wall Liner on NOx Emission in Aircraft Gas Turbine Engine Combustors
Effects of Dilution Flow Balance and Double-wall Liner on NOx Emission in Aircraft Gas Turbine Engine Combustors 9 HIDEKI MORIAI *1 Environmental regulations on aircraft, including NOx emissions, have
More informationProgress in Predicting Soot Particle Numbers in CFD Simulations of GDI and Diesel Engines
International Multidimensional Engine Modeling User's Group Meeting April 20, 2015, Detroit, Michigan Progress in Predicting Soot Particle Numbers in CFD Simulations of GDI and Diesel Engines Abstract
More informationUsing OpenFOAM. Chen Huang PhD student CERC. Chalmers University of Technology. 5 th OpenFOAM Workshop / June 21-24, 2010, Gothenburg
Modeling of Gasoline Hollow Cone Spray Using OpenFOAM Chen Huang PhD student Department of Chalmers University of Technology Outline 1. Motivation 2. Modifications i in OpenFOAM Library 3. Modelling of
More information2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT-2012)
The analysis of GDI engine soot emission based on spray and ignition timing tactics LIN Man-qun 1, 2, a, ZHOU Peng 1, 2, b, QIN Jing 1, 2, c, PEI Yi-qiang 2, d, PN Suo-zhu 2, e (1, Internal Combustion
More informationDigital Shaping and Optimization of Fuel Injection Pattern for a Common Rail Automotive Diesel Engine through Numerical Simulation
Digital Shaping and Optimization of Fuel Injection Pattern for a Common Rail Automotive Diesel Engine through Numerical Simulation European GT Conference 2017 - Frankfurt am Main Politecnico di Torino:
More informationSatbir Singh and Rolf D. Reitz Engine Research Center, Department of Mechanical Engineering, University of Wisconsin, Madison
Comparison of Characteristic Time (), Representative Interactive Flamelet (RIF), and Direct Integration with Detailed Chemistry Combustion Models against Multi-Mode Combustion in a Heavy-Duty, DI Diesel
More informationSTATE OF THE ART OF PLASMATRON FUEL REFORMERS FOR HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINES
Bulletin of the Transilvania University of Braşov Vol. 3 (52) - 2010 Series I: Engineering Sciences STATE OF THE ART OF PLASMATRON FUEL REFORMERS FOR HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINES R.
More informationNumerical Study of Multi-Component Spray Combustion with a Discrete Multi- Component Fuel Model
Numerical Study of Multi-Component Spray Combustion with a Discrete Multi- Component Fuel Model Y. Ra, and R. D. Reitz Engine Research Center, University of Wisconsin-Madison Madison, Wisconsin 53706 USA
More informationEEN-E2002 Combustion Technology 2017 LE 3 answers
EEN-E2002 Combustion Technology 2017 LE 3 answers 1. Plot the following graphs from LEO-1 engine with data (Excel_sheet_data) attached on my courses? (12 p.) a. Draw cyclic pressure curve. Also non-fired
More informationHomogeneous Charge Compression Ignition combustion and fuel composition
Loughborough University Institutional Repository Homogeneous Charge Compression Ignition combustion and fuel composition This item was submitted to Loughborough University's Institutional Repository by
More informationis the crank angle between the initial spark and the time when about 10% of the charge is burned. θ θ
ME 410 Day 30 Phases of Combustion 1. Ignition 2. Early flame development θd θ 3. Flame propagation b 4. Flame termination The flame development angle θd is the crank angle between the initial spark and
More informationImproving Fuel Efficiency with Fuel-Reactivity-Controlled Combustion
ERC Symposium 2009 1 Improving Fuel Efficiency with Fuel-Reactivity-Controlled Combustion Rolf D. Reitz, Reed Hanson, Derek Splitter, Sage Kokjohn Engine Research Center University of Wisconsin-Madison
More informationTURBULENCE-COMBUSTION INTERACTION IN DIRECT INJECTION DIESEL ENGINE
THERMAL SCIENCE: Year 2014, Vol. 18, No. 1, pp. 17-27 17 TURBULENCE-COMBUSTION INTERACTION IN DIRECT INJECTION DIESEL ENGINE by Mohamed BENCHERIF a,c*, Mohand TAZEROUT b, and Abdelkrim LIAZID c a University
More informationOptical methods for combustion research
KCFP Södertälje May 8, 2008 Optical methods for combustion research Mattias Richter Associate Professor Division of Combustion, Sweden Tolvan Tolvansson, 2007 Johannes Lindén, Division of Combustion Chemiluminescence
More informationOptical Techniques in Gasoline Engine Performance and Emissions Development
Optical Techniques in Gasoline Engine Performance and Emissions Development TC GDI engines: analysis and development techniques to solve pre-ignition and soot formation issues Ernst Winklhofer AVL List
More information* Corresponding author
Characterization of Dual-Fuel PCCI Combustion in a Light-Duty Engine S. L. Kokjohn * and R. D. Reitz Department of Mechanical Engineering University of Wisconsin - Madison Madison, WI 5376 USA Abstract.
More informationInvestigation on Diesel Engine for Airflow and Combustion in a Hemispherical Combustion Chamber
International Journal of Current Engineering and Technology E-ISSN 2277 4106, P-ISSN 2347 5161 2015INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijcet Research Article Investigation
More informationPartially Premixed Combustion (PPC) for low load conditions in marine engines using computational and experimental techniques
Aalto University School of Engineering Department of Energy Technology Kendra Shrestha Partially Premixed Combustion (PPC) for low load conditions in marine engines using computational and experimental
More informationNatural Gas fuel for Internal Combustion Engine
Natural Gas fuel for Internal Combustion Engine L. Bartolucci, S. Cordiner, V. Mulone, V. Rocco University of Rome Tor Vergata Department of Industrial Engineering Outline Introduction Motivations and
More informationExperimental investigation of ethanol-gasoline dual-fuel on particle emissions at the exhaust of a small displacement engine
Experimental investigation of ethanol-gasoline dual-fuel on particle emissions at the exhaust of a small displacement engine F. Catapano, S. Di Iorio, P. Sementa, B. M. Vaglieco Istituto Motori CNR, Naples
More informationNumerical Study of Flame Lift-off and Soot Formation in Diesel Fuel Jets
Numerical Study of Flame Lift-off and Soot Formation in Diesel Fuel Jets Song-Charng Kong*, Yong Sun and Rolf D. Reitz Engine Research Center, Department of Mechanical Engineering University of Wisconsin
More informationNumerical Modelling of Mixture Formation and Combustion in DISI Hydrogen Engines with Various Injection Strategies
Copyright 2014 SAE International 2014-01-2577 Numerical Modelling of Mixture Formation and Combustion in DISI Hydrogen Engines with Various Injection Strategies A. Hamzehloo and P.G. Aleiferis University
More informationAssessment of Innovative Bowl Geometries over Different Swirl Ratios/EGR rates
Assessment of Innovative Bowl Geometries over Different Swirl Ratios/EGR rates Andrea Bianco 1, Federico Millo 2, Andrea Piano 2, Francesco Sapio 2 1: POWERTECH Engineering S.r.l., Turin ITALY 2: Politecnico
More informationCOMPARISON OF BREAKUP MODELS IN SIMULATION OF SPRAY DEVELOPMENT IN DIRECT INJECTION SI ENGINE
Journal of KONES Powertrain and Transport, Vol. 17, No. 4 2010 COMPARISON OF BREAKUP MODELS IN SIMULATION OF SPRAY DEVELOPMENT IN DIRECT INJECTION SI ENGINE Przemys aw wikowski, Piotr Jaworski, Andrzej
More informationIncreased efficiency through gasoline engine downsizing
Loughborough University Institutional Repository Increased efficiency through gasoline engine downsizing This item was submitted to Loughborough University's Institutional Repository by the/an author.
More informationENGINE COMBUSTION SIMULATION USING OPENFOAM
ENGINE COMBUSTION SIMULATION USING OPENFOAM K. S. Kolambe 1, S. L. Borse 2 1 Post Graduate Engineering Student, Department of Mechanical Engineering. 2, Associate Professor, Department of Mechanical Engineering
More informationATELIER: SIMULATION NUMÉRIQUE POUR LES GROUPES MOTOPROPULSEURS 2 FÉVRIER 2017 SAINT-ETIENNE-DU-ROUVRAY
ATELIER: SIMULATION NUMÉRIQUE POUR LES GROUPES MOTOPROPULSEURS 2 FÉVRIER 2017 SAINT-ETIENNE-DU-ROUVRAY 1 ENGINE AND VEHICLE MODELING & SIMULATION SCIENTIFIC AND TECHNICAL CHALLENGES 2 CONTEXT Main drivers
More informationModule 3: Influence of Engine Design and Operating Parameters on Emissions Lecture 14:Effect of SI Engine Design and Operating Variables on Emissions
Module 3: Influence of Engine Design and Operating Parameters on Emissions Effect of SI Engine Design and Operating Variables on Emissions The Lecture Contains: SI Engine Variables and Emissions Compression
More information1. INTRODUCTION 2. EXPERIMENTAL INVESTIGATIONS
HIGH PRESSURE HYDROGEN INJECTION SYSTEM FOR A LARGE BORE 4 STROKE DIESEL ENGINE: INVESTIGATION OF THE MIXTURE FORMATION WITH LASER-OPTICAL MEASUREMENT TECHNIQUES AND NUMERICAL SIMULATIONS Dipl.-Ing. F.
More informationPlasma Assisted Combustion in Complex Flow Environments
High Fidelity Modeling and Simulation of Plasma Assisted Combustion in Complex Flow Environments Vigor Yang Daniel Guggenheim School of Aerospace Engineering Georgia Institute of Technology Atlanta, Georgia
More informationMODELING AND ANALYSIS OF DIESEL ENGINE WITH ADDITION OF HYDROGEN-HYDROGEN-OXYGEN GAS
S465 MODELING AND ANALYSIS OF DIESEL ENGINE WITH ADDITION OF HYDROGEN-HYDROGEN-OXYGEN GAS by Karu RAGUPATHY* Department of Automobile Engineering, Dr. Mahalingam College of Engineering and Technology,
More informationNumerical simulation of detonation inception in Hydrogen / air mixtures
Numerical simulation of detonation inception in Hydrogen / air mixtures Ionut PORUMBEL COMOTI Non CO2 Technology Workshop, Berlin, Germany, 08.03.2017 09.03.2017 Introduction Objective: Development of
More informationModule 2:Genesis and Mechanism of Formation of Engine Emissions Lecture 9:Mechanisms of HC Formation in SI Engines... contd.
Mechanisms of HC Formation in SI Engines... contd. The Lecture Contains: HC from Lubricating Oil Film Combustion Chamber Deposits HC Mixture Quality and In-Cylinder Liquid Fuel HC from Misfired Combustion
More informationDARS v2.10 New Features & Enhancements
DARS v2.10 New Features & Enhancements Why DARS? Enabling detailed chemistry in your CAE simulations Take the right design choices, including chemical effects Faster and cheaper design cycles Evaluation
More information3D In-cylinder Cold Flow Simulation Studies in an IC Engine using CFD
Volume 1, Issue 1, July-September, 2013, pp. 64-69, IASTER 2013 www.iaster.com, Online:2347-5188 Print: 2347-8772 ABSTRACT 3D In-cylinder Cold Flow Simulation Studies in an IC Engine using CFD A Lakshman,
More informationWhich are the four important control loops of an spark ignition (SI) engine?
151-0567-00 Engine Systems (HS 2017) Exercise 1 Topic: Lecture 1 Johannes Ritzmann (jritzman@ethz.ch), Raffi Hedinger (hraffael@ethz.ch); October 13, 2017 Problem 1 (Control Systems) Why do we use control
More informationComputational Study of Homogeneous and Stratified Combustion in a Compressed Natural Gas Direct Injection Engine
Proceedings of the 4th IASME / WSEAS International Conference on ENERGY & ENVIRONMENT (EE'9) Computational Study of Homogeneous and in a Compressed Natural Gas Direct Injection Engine S. ABDULLAH, W.H.
More informationSimulating Gas-Air Mixture Formation for Dual-Fuel Applications
Simulating Gas-Air Mixture Formation for Dual-Fuel Applications Karri Keskinen, Ossi Kaario, Mika Nuutinen, Ville Vuorinen, Zaira Künsch and Martti Larmi Thermodynamics and Combustion Technology Research
More information3D CFD Modeling of Gas Exchange Processes in a Small HCCI Free Piston Engine
3D CFD Modeling of Gas Exchange Processes in a Small HCCI Free Piston Engine Aimilios Sofianopoulos, Benjamin Lawler, Sotirios Mamalis Department of Mechanical Engineering Stony Brook University Email:
More informationNumerical Simulation of the Effect of 3D Needle Movement on Cavitation and Spray Formation in a Diesel Injector
Journal of Physics: Conference Series PAPER OPEN ACCESS Numerical Simulation of the Effect of 3D Needle Movement on Cavitation and Spray Formation in a Diesel Injector To cite this article: B Mandumpala
More informationSimulation of single diesel droplet evaporation and combustion process with a unified diesel surrogate
ILASS-Americas 29th Annual Conference on Liquid Atomization and Spray Systems, Atlanta, GA, May 2017 Simulation of single diesel droplet evaporation and combustion process with a unified diesel surrogate
More informationCFD Modeling of Spray Formation in Diesel Engines
Athens Journal of Technology and Engineering December 2017 CFD Modeling of Spray Formation in Diesel Engines By Mohamed Maher Ahmed Abu-Elhamyel Omar Hassan Alaa El-Din Ramadan Aya Diab Mostafa Abdelkhalek
More information