An Analysis of the Wake of Pedalling Cyclists in a Tandem Formation

Nathan Barry, David Burton, John Sheridan, Mark Thompson, Nicholas A.T. Brown

Research output: Contribution to journalArticle

Abstract

Aerodynamics is a critical factor in the performance of cyclists, with drag being the dominant resistive force at racing speeds. Many cycling events involve athletes riding in close proximity. Previous studies have shown that flow interactions result in significant drag reductions for tandem cyclists, inline parallel to the flow [1-5]. However, the flow mechanisms associated with these changes have not been well characterised to date. This paper reports the results of wake surveys of an athlete in single and tandem formations in the Monash Wind Tunnel. Flow measurements were phase averaged over segments of the crank cycle to investigate the dynamic evolution of the wake of a pedalling cyclist. Results show that the dominant hip vortices previously identified in the wake of a single cyclist remain dominant in the trailing cyclist wake, with minimal reduction in vorticity. Wake profiles indicate the large drag saving experienced by a trailing cyclist are not due to disruption of the wake vortices or significant streamwise momentum recovery.

Original languageEnglish
Pages (from-to)7-12
Number of pages6
JournalProcedia Engineering
Volume147
DOIs
Publication statusPublished - 2016
Externally publishedYes
Event11th conference of the International Sports Engineering Association, ISEA 2016 - Delft, Netherlands
Duration: 11 Jul 201614 Jul 2016

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Drag
Vortex flow
Flow interactions
Drag reduction
Flow measurement
Vorticity
Wind tunnels
Aerodynamics
Momentum
Recovery

Cite this

Barry, Nathan ; Burton, David ; Sheridan, John ; Thompson, Mark ; Brown, Nicholas A.T. / An Analysis of the Wake of Pedalling Cyclists in a Tandem Formation. In: Procedia Engineering. 2016 ; Vol. 147. pp. 7-12.
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An Analysis of the Wake of Pedalling Cyclists in a Tandem Formation. / Barry, Nathan; Burton, David; Sheridan, John; Thompson, Mark; Brown, Nicholas A.T.

In: Procedia Engineering, Vol. 147, 2016, p. 7-12.

Research output: Contribution to journalArticle

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