Analysis of Cyclist’s Drag on the Aero Position Using Numerical Simulations and Analytical Procedures: A Case Study

International Journal of Environmental Research and Public Health

卷:17

TiagoM. Barbosa¹  Pedro Forte²  JorgeE. Morais²  Beat Knechtle³  DanielA. Marinho⁴  PantelisT. Nikolaidis⁵ 

[1] Departamento de Desporto e Educação Física, Instituto Politécnico de Bragança, 5300-253 Bragança, Portugal;

[2] Department of Sports, Higher Institute of Educational Sciences of the Douro, 4560-708 Penafiel, Portugal;

[3] Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland;

[4] Research Center for Sports Health and Human Development, 6201-001 Covilhã, Portugal;

[5] School of Health and Caring Sciences, University of West Attica, 12243 Athens, Greece;

关键词: cycling;    drag;    comparison;    CFD;    analytical procedures;   

DOI  :  10.3390/ijerph17103430

来源: DOAJ

【 摘 要 】

Background: Resistance acting on a cyclist is a major concern among the cycling fraternity. Most of the testing methods require previous training or expensive equipment and time-consuming set-ups. By contrast, analytical procedures are more affordable and numerical simulations are perfect for manipulating and controlling inputs. The aim of this case study was to compare the drag of a cyclist in the aero position as measured using numerical simulation and analytical procedures. Methods: An elite male cyclist (65 kg in mass and 1.72 m in height) volunteered to take part in this research. The cyclist was wearing his competition gear, helmet and bicycle. A three-dimensional model of the bicycle and cyclist in the aero position was obtained to run the numerical simulations. Computational fluid dynamics (CFD) and a set of analytical procedures were carried out to assess drag, frontal area and drag coefficient, between 1 m/s and 22 m/s, with increments of 1 m/s. The t-test paired samples and linear regression were selected to compare, correlate and assess the methods agreement. Results: No significant differences (t = 2.826; p = 0.275) between CFD and analytical procedures were found. The linear regression showed a very high adjustment for drag (R² = 0.995; p < 0.001). However, the drag values obtained by the analytical procedures seemed to be overestimated, even though without effect (d = 0.11). Conclusions: These findings suggest that drag might be assessed using both a set of analytical procedures and CFD.

【 授权许可】

Unknown