Scale Hyperloop Status Report

Transcription

1 Scale Hyperloop Status Report 18 March 2014 DREW BELL, ELLIOT GIRAUD, LOUIS ZHAO, LOGAN WAN, TUT TANGTRAGULCHAROEN ADVISOR: PROF. CARLOS PANTANO- RUBINO SPONSOR: SHELL OIL CO. 1

2 Contents I. Introduc,on I. Hyperloop Background II. III. IV. System Updates i. Tubular Linear Induc,on Motor ii. Capsule iii. Tube iv. Air Skis Revised Budget Revised Schedule DREW BELL 2

3 IntroducOon I. What is Hyperloop? II. Brainchild of Elon Musk, transporta,on system composed of an evacuated tube, propulsion system, and passenger capsule Intended to connect Los Angeles to San Francisco and travel at near sonic speeds Project Objec,ves Produce scaled down prototype Explore feasibility of concept Op,mize prototype performance Major Deliverables Evacuated tube Linear Induc,on Motor Controlled vehicle DREW BELL 3

4 Previous Motor Design 12 A peak current per turn 3 phase 18 Gauge copper wires Machined cold- pressed steel 100 turns per slot 2 slots for each phase 2.54 cm slot pitch TUT TANGTRAGULCHAROEN 4

5 Modeling of Tubular Linear InducOon Motor Based on the work of Zagirnyak et. al. Their findings developed a be^er method of analyzing the usually cumbersome problem in evalua,ng the performance of a TLIM design The method of surface impedance was employed to predict the performance of a mul,phase/ mul,layer TLIM The result of the model and the experimental result were compared TUT TANGTRAGULCHAROEN 5

6 Final Design Force (N) Sta,c Force Output with frequency = 10 Hz Voltage (V) Number of Phase 3 Number of Poles 4 Number of Turn per Slot 217 Slot Height.75 inches Stator Back Height Stator Width Stator Length Slot Pitch Average Air Gap Wire Size Stator Core Material 1.75 inches 2 inches 36 inches 1 inch inches 18 gauge M- 22 Electrical Steel TUT TANGTRAGULCHAROEN 6

7 Current State and Next Steps The electrical steel and the enamel coated copper wires has been purchased The slot insulator is yet to be purchased Copper wires will be wound through the ECE Machine Shop The electrical sheet steel will be waterje^ed in the required comb shape TUT TANGTRAGULCHAROEN 7

8 Capsule Status Design finalized: 1. Larger capsule for motor tes,ng 2. Smaller capsule for full system tes,ng Components purchased: Low fric,on transfer bearings 2.25 Iron rod (lost in transit: UPS) Ultra conduc,ve copper sheet Electric ducted fan Electronic speed controller Arduino Fio xbee wireless RF module Construc,on Started LOGAN WAN 8

9 Motor- test Capsule Design A. High conduc,vity copper B. Iron rod (99.6% pure) C. Low fric,on ball transfer bearings A C B LOGAN WAN 9

10 Current Progress Wireless control system diagram xbee wireless xbee wireless Arduino Fio ESC Ducted Fan Capsule LOGAN WAN 10

11 Next Steps: 1. Construct capsule aker iron shipment 2. Finalize wireless serial communica,on code 3. Interface with electric ducted fan / speed controller 4. Electronics packaging in final setup Then move to vacuum pump assembly LOGAN WAN 11

12 Tube Design DREW BELL 12

13 Tube Design Components A. Off- the- shelf 60 Radius, 3 Nominal Rigid Conduit Tubing B. Clear PVC straightaways for motor and observa,on C. Off- the- shelf flanges steel and PVC flanges D. Economical ver,cal support elements E. Reinforced radial support A C E D DREW BELL 13

14 Design Problem Tube SelecOon Requirement: the tube must withstand the opera,ng loads of the system: 1. Pressure approximately 14 psig 2. Load reac,on forces from capsule on turn Load Case Study: Capsule mass Maximum velocity m = 2kg v = 30 m/s Tube radius r = 1.5m Reac,on force on tube F= m v 2 /r = (2kg) (30 m/s ) 2 /1.5m =1200N Contact points p = 4 Result: Each capsule bearings must support F/4 = 300N r v F DREW BELL 14

15 Methodology Assumed bearing radius much smaller than pipe radius, R >> r Applied 25% of force to semi- infinite square plate as a point force to simulate each roller bearing F_total = 1200N F_per_bearing = 300N Plate_length=500mm Edges constrained in all DOF Material Proper,es Yield stress of A500 steel = 230 MPa Factor of Safety = 3 Allowable Stress = ~75Mpa 300N 500mm DREW BELL 15

16 5mm Steel (Rigid Conduit) 300N Point Force Max Stress von Mises = MPa Max Displacement = mm DREW BELL 16

17 Results Our Design Our Design 300N Determina,on: Minimum advisable wall thickness is 3mm Final Selec,on: 5.2mm Rigid Conduit due to strength and off- the- shelf availability DREW BELL 17

18 Design Problem Tube Support Simplifica,on x F(capsule) = 1200N - z W = 1424N F(fric,on) = 570N μ = 0.4 F(x) = = 630N 0 x - z With lateral support F(support) x F(capsule) = 1200N - z W = 1424N F(fric,on) = 570N μ = 0.4 F(x) = F(support) = 0 F(support) = 1575N = 354 lb per turn ELLIOT GIRAUD 18

19 Support Structure Provides horizontal support needed to counteract the forces created in the turns by the capsule At 30m/s, each support needs to account for 118lb of force (3 supports per turn) 3/16 Hot rolled steel plates ELLIOT GIRAUD 19

20 Next Steps: Machining and transforma,on of ordered parts Implementa,on of tube supports and bracing Construc,on of tubing Integra,on of vacuum pump and data acquisi,on systems 300N ELLIOT GIRAUD 20

21 Reach Goals - Compressor Compression mechanism Fan: faithful to original design, difficult to implement/fabricate at small scales Piston: Easier to implement (than a fan) via linear actuators, takes up more room Unclear air bearing pressure requirements Ques,onable efficiency in near vacuum condi,ons Rela,vely low speeds Source: Fujiwara, et. al LOUIS ZHAO 21

22 Reach Goals - Air Skis Fluid hammer Instability as flow rapidly changes direc,on Exacerbated by curves Rota,onal effects Outlet geometry (single, mul,ple, porous) Capsule and tube geometry Transport from compressor Source: plumbingmart.com LOUIS ZHAO 22

23 Reach Goals - Air Skis Numerical simula,on - Reynolds Equa,on Newtonian, Navier Stokes, incompressible, constant viscosity, thin film approxima,on (laminar, iner,a- less) Simula,on assumes compressible (!), isothermal perfect gas Finite element approach Method of weighted residuals, linear triangular discre,za,on Inputs: supply pressure, inlet diameter, discharge coefficient, number and posi,on of inlets Boundary condi,ons: feeding pressure, ambient pressure, squeeze and compressibility parameters Results: flow rate, pressure distribu,on, loading capacity, s,ffness LOUIS ZHAO 23

24 February March April Task 2/3 2/10 2/17 2/24 3/3/ 3/10 3/17 3/24 3/31 4/7 4/14 4/21 4/28 Finalize Motor Design and Drawings Track Connector and Support Design Determining Coefficient of Rolling FricOon Capsule Design Internal Compressor Design Motor ConstrucOon Capsule ConstrucOon Track ConstrucOon Motor Debugging Compressor ConstrucOon ParOal System Test Non- dimensional Analysis Final System TesOng Final PresentaOon and Report 24

25 Budget Item Quantity Cost ($) Subtotal ($) Capsule xbee Wireless Arduino Fio % Iron Ducted fan Electronic speed control LiPo Battery Omnitrack ball transfer Super conductive copper Motor Electrical steel and copper Tube / Pipe Clear PVC 10ft degree conduit Gasket Forged steel flange Forged steel flange Clear primer Pipe cement LOGAN WAN 25

26 Budget Tube Support 3/16 inch THICK A36 Steel Plate Aluminum Female Threaded Round Standoffs Screws Raw Materials Cinder Blocks Rubber Total LOGAN WAN 26

27 Summary Objec&ve: To design and build a scale model of the Hyperloop and determine the full scale feasibility. Deliverables: Vacuum tube system Linear induc,on motor Capsule with compressor fan Important Milestones: March 31: System test with ball bearings April 17: Integrate with internal compressor April 28: Finish feasibility study and final report LOGAN WAN 27

28 QuesOons? 28