Low Aerodynamic Drag Suit for Cycling - Design and Testing

Live Spurkland, Lars Morten Bardal, Lars Sætran, Luca Oggiano

Abstract

The focus on garment aerodynamics is increasing in high velocity sports where aerodynamics is crucial such as cycling, speed skating and alpine skiing. Recently published research show that a low drag suit manipulating the flow around the body can considerably enhance an athlete’s performance. This project seeks to improve the Norwegian sportswear manufacturer Trimtex Sport AS’ pro cycling kit using the best currently available textiles. Changes from the original design are made with the intention of optimizing fabric zones and seam placement. Drag measurements on cylinder models, cyclists and full-scale mannequins of the upper and lower body were conducted in the wind tunnel. The reduction in aerodynamic drag was significant on cylinders, and final power savings of 8 watts due to drag reductions was obtained on the jersey and 5 watts on the bib shorts for a cyclist racing at 50 km/h.

References

  1. Achenbach 1971. Influence Of Surface Roughness On The Cross-Flow Around A Circular Cylinder. Journal Of Fluid Mechanics, 46, 321-335.
  2. Auteuil, Larose & Zan 2010. Relevance Of Similitude Parameters For Drag Reduction In Sport Aerodynamics. 8th Conference Of The International Sports Engineering Association (Isea). Elsevier L.Td.
  3. Baker. Dec 10. 2010 2010. Testing Velocity Speedsuit At The A2 Wind Tunnel. Available From: Http://Blog.Hincapie.Com/Post/Testing-VelocitySpeedsuit-At-The-A2-Wind-Tunnel.Aspx 2014].
  4. Bardal & Reid 2012. Testing Of Fabric For Use In Alpine Ski Competition Suits. Engineering Of Sport Conference 2012. Elsevier Ltd.
  5. Bassett 1999. Comparing Cycling World Hour Records, 1967-1996: Modelling With Empirical Data. Medicine & Science In Sports & Exercise, 31.
  6. Bearman & Harvey 1993. Control Of Circular Cylinder Flow By The Use Of Dimples. American Institute Of Aeronautics And Astronautics Journal, 31.
  7. Bioracer. 2014. Bioracer Speedmaster, Medal Winning Technology [Online]. Bioracer. Available: Http://Www.Bioracer.Com/En/News/318/BioracerSpeedmaster-Medal-Winning-Technology [Accessed Nov 8 2014].
  8. Brownlie, Kyle, Carbo, Demarest, Harber, Macdonald & Nordstrom 2009. Streamlining The Time Trial Apparel Of Cyclists: The Nike Swift Spin Project. Sports Technology Journal, 2, 53-60.
  9. Chowdhury 2012. Aerodynamic Design Of Sports Garments. In: Colman, D. J. (Ed.) Applied Aerodynamics. Intech.
  10. Chowdhury, Alam & Subic 2010. Aerodynamic Performance Evaluation Of Sports Textile. 8th Conference Of The Internationsl Sports Engineering Association (Isea). Elsevier Ltd.
  11. Crouch, Sheridan, Burton, Thompson & Brown 2012. A Quasi-Static Investigation Of The Effect Of Leg Position On Cyclist Aerodynamic Drag. Procedia Engineering, 3-8.
  12. Oggiano, Brownlie, Troynikov, Bardal, Saeter & Saetran 2013. A Review On Skin Suits And Sport Garment Aerodynamics: Guidelines And State Of The Art. 6th Asia-Pasific Congress On Sports Technology (Apcst). Elsevier L.Td.
  13. Saetran & Oggiano 2008. Skin Suit Aerodynamics In Speed Skating. In: H., N. (Ed.) Sport Aerodynamics. Cism International Centre For Mechanical Sciences.
  14. Uci 2012. Clarification Guide Of The Uci Technical Regulation In: (Uci), U. C. I. (Ed.) 23.04.2014 Ed.
  15. Underwood. 2012. Aerodynamics Of Track Cycling. Doctor Of Philosophy, The University Of Canterbury.
  16. Underwood & Jermy 2011. Fabric Testing For Cycling Skinsuits. Elsevier L.Td.
  17. White 2006. Viscous Fluid Flow, Mcgraw Hill.
  18. Zdravkovich 1990. Conceptual Overview Of Laminar And Turbulent Flows Past Smooth And Rough Circular Cylinders. Journal Of Wind Engineering And Industrial Aerodynamics, 33, 53-62.
Download


Paper Citation


in Harvard Style

Spurkland L., Bardal L., Sætran L. and Oggiano L. (2015). Low Aerodynamic Drag Suit for Cycling - Design and Testing . In Proceedings of the 3rd International Congress on Sport Sciences Research and Technology Support - Volume 1: icSPORTS, ISBN 978-989-758-159-5, pages 89-96. DOI: 10.5220/0005589600890096


in Bibtex Style

@conference{icsports15,
author={Live Spurkland and Lars Morten Bardal and Lars Sætran and Luca Oggiano},
title={Low Aerodynamic Drag Suit for Cycling - Design and Testing},
booktitle={Proceedings of the 3rd International Congress on Sport Sciences Research and Technology Support - Volume 1: icSPORTS,},
year={2015},
pages={89-96},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005589600890096},
isbn={978-989-758-159-5},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 3rd International Congress on Sport Sciences Research and Technology Support - Volume 1: icSPORTS,
TI - Low Aerodynamic Drag Suit for Cycling - Design and Testing
SN - 978-989-758-159-5
AU - Spurkland L.
AU - Bardal L.
AU - Sætran L.
AU - Oggiano L.
PY - 2015
SP - 89
EP - 96
DO - 10.5220/0005589600890096