A Novel Approach for Skin Suit Aerodynamic Optimization Using Local Momentum Deficit

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Abstract

A new approach is introduced to evaluate the potential drag reduction by skin suit design in speed sport. The approach relies upon local flow information measured in the wake of a cyclist mannequin. Lagrangian Particle Tracking is employed to measure the distribution of time-average streamwise velocity in a cross-plane of 30 × 100 cm2 behind the stretched leg of the rider at a range of Reynolds numbers (0.4 × 105 < Re < 2.4 × 105). The expected Reynolds number effect is observed: a general wake narrowing at increasing speed. Unexpected local effects are also identified, which may be due to local variations in geometry of the rider’s leg. The conservation of momentum within a control volume containing the leg is used showing that the aerodynamic drag of the rider’s leg can be decreased by application of surface roughness. This outcome is validated by repeated measurements using zigzag tape on the legs’ surface.
Original languageEnglish
Title of host publicationProceedings of the 12th Conference of the International Sports Engineering Association (ISEA 2018)
Subtitle of host publicationEngineering of Sport
EditorsHugo G. Espinosa, David R. Rowlands, Jonathan Shepherd, David V. Thiel
PublisherMDPI
Number of pages7
DOIs
Publication statusPublished - 2018
EventISEA 2018: 12th Conference of the International Sports Engineering Association 'Engineering of Sport' - Brisbane, Australia
Duration: 26 Mar 201828 Mar 2018

Publication series

NameProceedings
Number6
Volume2
ISSN (Electronic)2504-3900

Conference

ConferenceISEA 2018: 12th Conference of the International Sports Engineering Association 'Engineering of Sport'
CountryAustralia
CityBrisbane
Period26/03/1828/03/18

Keywords

  • speed sports
  • cycling aerodynamics
  • aerodynamic drag optimization
  • skin suit
  • drag crisis
  • Lagrangian Particle Tracking

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    Terra, W., Sciacchitano, A., & Scarano, F. (2018). A Novel Approach for Skin Suit Aerodynamic Optimization Using Local Momentum Deficit. In H. G. Espinosa, D. R. Rowlands, J. Shepherd, & D. V. Thiel (Eds.), Proceedings of the 12th Conference of the International Sports Engineering Association (ISEA 2018): Engineering of Sport [222] (Proceedings ; Vol. 2, No. 6). MDPI. https://doi.org/10.3390/proceedings2060222