1 / 80

Advanced Simulation Techniques for IC Engines

ASTICE. Advanced Simulation Techniques for IC Engines. CFD- 3D general flow analysis. Application. Engine Cycle Simulation. Engine Cycle Simulation-Case 1. Weibe combustion model. Engine Cycle Simulation-Case 1. Single DI Weibe. Start of combustion  Crank angle at 1% burned.

ava-herman
Download Presentation

Advanced Simulation Techniques for IC Engines

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ASTICE Advanced Simulation Techniques for IC Engines

  2. CFD- 3D general flow analysis Application

  3. Engine Cycle Simulation

  4. Engine Cycle Simulation-Case 1 Weibe combustion model

  5. Engine Cycle Simulation-Case 1 Single DI Weibe Start of combustion Crank angle at 1% burned Weibe combustion model Fit Weibe function to experimental or CFD heat release • Combustion Duration & Weibe exponent • Calculated by non-linear least square method Start of combustion Crank angle at 0.5% burned Multiple DI Weibe • Premixed fraction, Premixed combustion duration , premixed Weibe exponent, mixing controlled combustion duration and mixing controlled Weibe exponent • Calculated by non-linear least square method

  6. Engine Cycle Simulation-Case 1 Single Weibe Model SOC = -5.3 Θd= 63.5 M = 0.96 Multiple Weibe Model SOC = -4.1 Pf = 0.1 Θd_p= 12 Mp = 0.5 Θd_p= 60 Mp = 1.15

  7. Engine Cycle Simulation-Case 1

  8. Engine Cycle Simulation-Case 1

  9. Engine Cycle Simulation-Case 1

  10. Engine Cycle Simulation-Case 1 Single Cylinder results Zoom

  11. Engine Cycle Simulation-Case 1 Single Cylinder results Scavenging

  12. Engine Cycle Simulation-Case 1 Single Cylinder results Fuel Energy 196.8 kW

  13. Engine Cycle Simulation-Case 1 Single Cylinder Model Firing Order/ No. Cylinders TC and IC model Filling & Emptying Model Friction Model

  14. Engine Cycle Simulation-Case 1 Filling & Emptying Model

  15. Engine Cycle Simulation-Case 1 Gas Exchange Diagram Filling & Emptying Results

  16. Engine Cycle Simulation-Case 1 Filling & Emptying Model Results Compressor Raw Map Turbine Raw Map

  17. Engine Cycle Simulation-Case 2 Multi-zone spray Model for Diesel combustion More info: SAE paper No. 2001-01-1246

  18. Engine Cycle Simulation-Case 2 Multi-zone spray Model for Diesel combustion

  19. Engine Cycle Simulation-Case 2 Multi-zone spray Model for Diesel combustion Start of Combustion Premixed combustion Temperature Distribution in Spray Zones

  20. Engine Cycle Simulation-Case 2 Multi-zone spray Model for Diesel combustion Combustion tale Peak heat release rate Temperature Distribution in Spray Zones

  21. Engine Cycle Simulation-Case 2 Multi-zone spray Model for Diesel combustion NOx & SOOT Fuel evaporation & Burn

  22. Engine Cycle Simulation-Case 2 Multi-zone spray Model for Diesel combustion Pressure & Temperature NormalizedFuel Injection, Evaporation, Burn and Heat release rate

  23. Engine Cycle Simulation-Case 3 Two-Zone knock model for SI and DF engine

  24. Engine Cycle Simulation-Case 3 Two-Zone knock model for SI and DF engine The Unburned Zone The Burned Zone CO CO H2O H2O CHO O CH4 O2 HO2 O2 CO2 N2 OH H2O2 CH3 OH N2 H H H2 CH2O Chemical Kinetics Thermodynamic Equilibrium Auto-ignition  Knock Heat Release

  25. Engine Cycle Simulation-Case 3 Two-Zone knock model for SI and DF engine

  26. Engine Cycle Simulation-Case 3 Two-Zone knock model for SI and DF engine Model Validation Continuous lines : Two-Zone model results Points : CAT Engine simulation results (SAE paper)

  27. Engine Cycle Simulation- Case 4 • 1D gas dynamic model 1D CFD Complex program Better Results Filling & Emptying Modeling

  28. Engine Cycle Simulation- Case 4 • 1D gas dynamic model Two-Step lax-Wendroff method Flow Limit Function

  29. Engine Cycle Simulation- Case 4 1D gas dynamic model

  30. Engine Cycle Simulation- Case 5 • Turbocharger Matching Criteria for turbo matching

  31. Engine Cycle Simulation- Case 5 • Turbocharger Matching/ Transient operation Load Increase Process

  32. Engine Cycle Simulation- Case 5 • Turbocharger Matching/ Transient operation 150 Sec Ramp of Throttle from 0-100-Transient Response

  33. Engine Cycle Simulation- Case 5 • Turbocharger Matching/ Transient operation 150 Sec Ramp of Throttle from 0-100-Transient Response

  34. Engine Cycle Simulation- Case 5 • Turbocharger Matching/ Transient operation 40 Sec Ramp of Throttle from 0-100-Transient Response

  35. Engine Cycle Simulation- Case 5 • Turbocharger Matching/ Transient operation 40 Sec Ramp of Throttle from 0-100-Transient Response

  36. Engine Cycle Simulation- Case 5 • Turbocharger Matching/ Transient operation 12 Sec Ramp of Throttle from 0-100-Transient Response

  37. Engine Cycle Simulation- Case 5 • Turbocharger Matching/ Transient operation 12 Sec Ramp of Throttle from 0-100-Transient Response

  38. Optimization Process RSM Methodology

  39. Optimization Model- RSM

  40. Optimization Model- DOE

  41. Optimization Model- DOE Methods Increase in Run time Increase in Level of Accuracy

  42. Optimization Example 1 Injection timing VS Speed & fuel amount Response Surfaces

  43. Optimization Example 1 Injection timing VS Speed & fuel amount Optimized Map

  44. Cooling circuit simulation

  45. Cooling circuit simulation-Case 1 • Simple and Extended model of Heat exchanger Simple Model

  46. Cooling circuit simulation-Case 1 • Simple and Extended model of Heat exchanger Extended Model

  47. Cooling circuit simulation-Case 1 • Simple and Extended model of Heat exchanger

  48. Cooling circuit simulation-Case 2 • Coupled Solution with Engine Cycle Simulation/ Transient/ Extended pump model Heat transfer BCs Heat Rejection

  49. Cooling circuit simulation-Case 2 • Coupled Solution with Engine Cycle Simulation/ Transient/ Extended pump model Transient Operation of the engine

  50. Cooling circuit simulation-Case 2 • Coupled Solution with Engine Cycle Simulation/ Transient/ Extended pump model Transient Operation of the engine

More Related