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A comparison of the wake structures of scale and full-scale pedalling cycling models

Citation

Crouch, TN and Burton, D and Venning, JA and Thompson, MC and Brown, NAT and Sheridan, J, A comparison of the wake structures of scale and full-scale pedalling cycling models, Procedia Engineering, 147 pp. 13-19. ISSN 1877-7058 (2016) [Refereed Article]


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Copyright 2016 The Authors. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) https://creativecommons.org/licenses/by-nc-nd/4.0/

DOI: doi:10.1016/j.proeng.2016.06.182

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.

Item Details

Item Type:Refereed Article
Keywords:Aerodynamics; bluff-body; sports; cycling; wake structure; vortex flows.
Research Division:Engineering
Research Group:Interdisciplinary Engineering
Research Field:Fluidisation and Fluid Mechanics
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Venning, JA (Mr James Venning)
ID Code:115602
Year Published:2016
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2017-03-31
Last Modified:2017-05-02
Downloads:5 View Download Statistics

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