Aerodynamic Development of a Road CyclingHelmet: Breakaway with CFD
3• Louis Garneau offers a cycling solution whichincludes a one stop shop for all your cycling needs.
ENGINEERINGSIMULATIONCFDFEA
Goal:Design the most aerodynamiccycling helmet for road racingwithout compromising ventilation
CFD of existinghelmets3D CADCFD/CADiterationsRapidPrototypingWind tunneltestingToolingDesign Process6
Analysis of existing helmets7Specialized Prevail LGS X-LiteLGS QuartzGiro Aeon
Analysis of existing helmetsV CdALGS Quartz42 km/hr0.0105LGS X-Lite 0.0115Giro Aeon 0.0134SpecializedPrevail0.00988LGS X-L...
Ideas for improvement• Design helmet withrespect to head angle• Reduce frontal areaby allowing air straightthrough;• Adjus...
3D CAD10
3D CAD11
Scan + 3D CAD12
CFD Analysis Set-up• 31 million elements• Steady state• Spalart-Almaras• Low-Reynolds wall– 15 layers– Y+ <= 1• 42 km/hr13
CFD Analysis: Virtual Wind tunnel
CFD Analysis: Virtual Wind tunnel
CFD Analysis: Virtual Wind tunnel
CFD Analysis: Virtual Wind tunnel
CFD Analysis: Virtual Wind tunnel
Achievements• 17.7% drag reduction compared tobest helmet tested• Reduced frontal area• Increased ventilation26
Benefits of CFD27PERFORMANCE
Wind Tunnel Testing: NRC28
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 Gir...
Wind Tunnel Testing:Course VS GIRO Air Attack30
Wind Tunnel Testing Results31
Team Europcar32
Thank you!Questions?
Aerodynamic Development of a Road Cycling
Aerodynamic Development of a Road Cycling
Aerodynamic Development of a Road Cycling
Aerodynamic Development of a Road Cycling
Aerodynamic Development of a Road Cycling
Aerodynamic Development of a Road Cycling
Aerodynamic Development of a Road Cycling
Aerodynamic Development of a Road Cycling
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Aerodynamic Development of a Road Cycling

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

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