A Comparison of the Wake Structures of Scale and Full-scale Pedalling Cycling Models

T. N. Crouch; D. Burton; J. A. Venning; M. C. Thompson; N. A. T. Brown; J. Sheridan

doi:10.1016/j.proeng.2016.06.182

A Comparison of the Wake Structures of Scale and Full-scale Pedalling Cycling Models

T. N. Crouch, D. Burton, J. A. Venning, M. C. Thompson, N. A. T. Brown, J. Sheridan

Mechanical & Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

8 Citations (Scopus)

Abstract

This paper presents a novel approach to better understand the unsteady aerodynamics associated with a dynamically pedalling cyclist. Using high resolution Particle Image Velocimetry (PIV) in a water channel, the large-scale wake structure is analysed for various phases of the crank cycle of a 1:4.5 scale-model cyclist/bicycle under both static and pedalling conditions. Both quasi-steady and dynamic pedalling leg results are compared with detailed velocity field surveys made in the wake of a full-scale pedalling cyclist mannequin of similar geometry and position in a wind tunnel. A time-averaged and phase-averaged analysis of the various flow regimes that occur throughout the pedal stroke shows good agreement between scale-model and full-scale mannequin investigations. This highlights the robustness of the formation of the primary wake flow structures when subjected to varying Reynolds number, bicycle/rider geometry and quasi-steady/dynamic pedalling conditions.

Original language	English
Title of host publication	The Engineering of SPORT 11
Editors	Arjen J. Jansen
Publisher	Elsevier
Pages	13-19
Number of pages	7
DOIs	https://doi.org/10.1016/j.proeng.2016.06.182
Publication status	Published - 2016
Event	ISEA Conference on Engineering of Sport 2016 - TU Delft, Delft, Netherlands Duration: 11 Jul 2016 → 14 Jul 2016 Conference number: 11th https://www.sciencedirect.com/journal/procedia-engineering/vol/147/suppl/C

Publication series

Name	Procedia Engineering
Publisher	Elsevier
Volume	147
ISSN (Print)	1877-7058

Conference

Conference	ISEA Conference on Engineering of Sport 2016
Country/Territory	Netherlands
City	Delft
Period	11/07/16 → 14/07/16
Other	11th conference of the International Sports Engineering Association took place in Delft from 11th up to 14th of July 2016 at TU Delft. ISEA: International Sports Engineering Association
Internet address	https://www.sciencedirect.com/journal/procedia-engineering/vol/147/suppl/C

Keywords

Aerodynamics
bluff-body
cycling
sports
vortex flows
wake structure

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32539410-oaFinal published version, 510 KBLicence: CC BY-NC-ND

Cite this

@inproceedings{5f93073e4f9b4835b08f691fd13b4862,

title = "A Comparison of the Wake Structures of Scale and Full-scale Pedalling Cycling Models",

abstract = "This paper presents a novel approach to better understand the unsteady aerodynamics associated with a dynamically pedalling cyclist. Using high resolution Particle Image Velocimetry (PIV) in a water channel, the large-scale wake structure is analysed for various phases of the crank cycle of a 1:4.5 scale-model cyclist/bicycle under both static and pedalling conditions. Both quasi-steady and dynamic pedalling leg results are compared with detailed velocity field surveys made in the wake of a full-scale pedalling cyclist mannequin of similar geometry and position in a wind tunnel. A time-averaged and phase-averaged analysis of the various flow regimes that occur throughout the pedal stroke shows good agreement between scale-model and full-scale mannequin investigations. This highlights the robustness of the formation of the primary wake flow structures when subjected to varying Reynolds number, bicycle/rider geometry and quasi-steady/dynamic pedalling conditions.",

keywords = "Aerodynamics, bluff-body, cycling, sports, vortex flows, wake structure",

author = "Crouch, \{T. N.\} and D. Burton and Venning, \{J. A.\} and Thompson, \{M. C.\} and Brown, \{N. A. T.\} and J. Sheridan",

year = "2016",

doi = "10.1016/j.proeng.2016.06.182",

language = "English",

series = "Procedia Engineering",

publisher = "Elsevier",

pages = "13--19",

editor = "Jansen, \{Arjen J.\}",

booktitle = "The Engineering of SPORT 11",

address = "Netherlands",

note = "ISEA Conference on Engineering of Sport 2016 ; Conference date: 11-07-2016 Through 14-07-2016",

url = "https://www.sciencedirect.com/journal/procedia-engineering/vol/147/suppl/C",

}

Crouch, TN, Burton, D, Venning, JA, Thompson, MC, Brown, NAT & Sheridan, J 2016, A Comparison of the Wake Structures of Scale and Full-scale Pedalling Cycling Models. in AJ Jansen (ed.), The Engineering of SPORT 11. Procedia Engineering, vol. 147, Elsevier, pp. 13-19, ISEA Conference on Engineering of Sport 2016, Delft, Netherlands, 11/07/16. https://doi.org/10.1016/j.proeng.2016.06.182

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AU - Crouch, T. N.

AU - Burton, D.

AU - Venning, J. A.

AU - Thompson, M. C.

AU - Brown, N. A. T.

AU - Sheridan, J.

N1 - Conference code: 11th

PY - 2016

Y1 - 2016

N2 - This paper presents a novel approach to better understand the unsteady aerodynamics associated with a dynamically pedalling cyclist. Using high resolution Particle Image Velocimetry (PIV) in a water channel, the large-scale wake structure is analysed for various phases of the crank cycle of a 1:4.5 scale-model cyclist/bicycle under both static and pedalling conditions. Both quasi-steady and dynamic pedalling leg results are compared with detailed velocity field surveys made in the wake of a full-scale pedalling cyclist mannequin of similar geometry and position in a wind tunnel. A time-averaged and phase-averaged analysis of the various flow regimes that occur throughout the pedal stroke shows good agreement between scale-model and full-scale mannequin investigations. This highlights the robustness of the formation of the primary wake flow structures when subjected to varying Reynolds number, bicycle/rider geometry and quasi-steady/dynamic pedalling conditions.

AB - This paper presents a novel approach to better understand the unsteady aerodynamics associated with a dynamically pedalling cyclist. Using high resolution Particle Image Velocimetry (PIV) in a water channel, the large-scale wake structure is analysed for various phases of the crank cycle of a 1:4.5 scale-model cyclist/bicycle under both static and pedalling conditions. Both quasi-steady and dynamic pedalling leg results are compared with detailed velocity field surveys made in the wake of a full-scale pedalling cyclist mannequin of similar geometry and position in a wind tunnel. A time-averaged and phase-averaged analysis of the various flow regimes that occur throughout the pedal stroke shows good agreement between scale-model and full-scale mannequin investigations. This highlights the robustness of the formation of the primary wake flow structures when subjected to varying Reynolds number, bicycle/rider geometry and quasi-steady/dynamic pedalling conditions.

KW - Aerodynamics

KW - bluff-body

KW - cycling

KW - sports

KW - vortex flows

KW - wake structure

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DO - 10.1016/j.proeng.2016.06.182

M3 - Conference Paper

AN - SCOPUS:84982953378

T3 - Procedia Engineering

SP - 13

EP - 19

BT - The Engineering of SPORT 11

A2 - Jansen, Arjen J.

PB - Elsevier

T2 - ISEA Conference on Engineering of Sport 2016

Y2 - 11 July 2016 through 14 July 2016

ER -

A Comparison of the Wake Structures of Scale and Full-scale Pedalling Cycling Models

Abstract

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Keywords

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