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Understanding the Aerodynamic Benefits of Drafting in the Wake of Cyclists

Proceedings, 2020, Vol.49 (1), p.32 [Peer Reviewed Journal]

EISSN: 2504-3900 ;DOI: 10.3390/proceedings2020049032

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  • Title:
    Understanding the Aerodynamic Benefits of Drafting in the Wake of Cyclists
  • Author: Christopher Brown ; Timothy Crouch ; David Burton ; Mark C. Thompson
  • Subjects: aerodynamic drag ; cycling aerodynamics ; speed sports ; wake dynamics
  • Is Part Of: Proceedings, 2020, Vol.49 (1), p.32
  • Description: A new approach is presented to characterize the aerodynamic benefit from riding in the wake of another cyclist at different downstream locations. The method presented uses the dynamic pressure deficit in the wake of a cycling mannequin to estimate percentage drag savings. In the experiments, the time-averaged velocity behind a cycling mannequin was recorded in 1 × 0.95 m cross-planes by two four-hole pressure (Cobra) probes for four static leg positions (0°, 90°, 180°, and 270°). It was found that the wake of the cycling mannequin propagated to one side or the other as it developed downstream, depending on the strength of the two large-scale counter-rotating streamwise vortical structures shed off the hips of the mannequin. In the near wake, the complex wake dynamics resulted in an inaccurate prediction of the relative drag reduction based upon a dynamic pressure deficit. However, as the wake developed and stabilised further downstream, the dynamic pressure deficit was found to provide a reasonable estimate of the aerodynamic drag reduction of riding in the wake of the lead rider.
  • Publisher: MDPI AG
  • Language: English
  • Identifier: EISSN: 2504-3900
    DOI: 10.3390/proceedings2020049032
  • Source: Open Access: DOAJ Directory of Open Access Journals
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