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Aerodynamic Development of a Road Cycling

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  • 1. Aerodynamic Development of a Road CyclingHelmet: Breakaway with CFD
  • 2. 3• Louis Garneau offers a cycling solution whichincludes a one stop shop for all your cycling needs.
  • 3. ENGINEERINGSIMULATIONCFDFEA
  • 4. Goal:Design the most aerodynamiccycling helmet for road racingwithout compromising ventilation
  • 5. CFD of existinghelmets3D CADCFD/CADiterationsRapidPrototypingWind tunneltestingToolingDesign Process6
  • 6. Analysis of existing helmets7Specialized Prevail LGS X-LiteLGS QuartzGiro Aeon
  • 7. Analysis of existing helmetsV CdALGS Quartz42 km/hr0.0105LGS X-Lite 0.0115Giro Aeon 0.0134SpecializedPrevail0.00988LGS X-Lite
  • 8. Ideas for improvement• Design helmet withrespect to head angle• Reduce frontal areaby allowing air straightthrough;• Adjust tail angle;• Adjust bridges angles;9LGS Quartz
  • 9. 3D CAD10
  • 10. 3D CAD11
  • 11. Scan + 3D CAD12
  • 12. CFD Analysis Set-up• 31 million elements• Steady state• Spalart-Almaras• Low-Reynolds wall– 15 layers– Y+ <= 1• 42 km/hr13
  • 13. CFD Analysis: Virtual Wind tunnel
  • 14. CFD Analysis: Virtual Wind tunnel
  • 15. CFD Analysis: Virtual Wind tunnel
  • 16. CFD Analysis: Virtual Wind tunnel
  • 17. CFD Analysis: Virtual Wind tunnel
  • 18. Achievements• 17.7% drag reduction compared tobest helmet tested• Reduced frontal area• Increased ventilation26
  • 19. Benefits of CFD27PERFORMANCE
  • 20. Wind Tunnel Testing: NRC28
  • 21. Wind Tunnel Testing Results29-3,0%-2,0%-1,0%0,0%1,0%2,0%3,0%4,0%5,0%Course Quartz Edge Diamond S-WorksPrevailGiro Aeon Giro Atmos CatlikeWhisperLazerHeliumChronoLegeraPerformanceincreasePerformance increase w/r to LGS Quartz
  • 22. Wind Tunnel Testing:Course VS GIRO Air Attack30
  • 23. Wind Tunnel Testing Results31
  • 24. Team Europcar32
  • 25. Thank you!Questions?