Reducing the athlete's aerodynamical resistance

Oggiano, Luca and Saetran, Lars and Loset, Sveinung and Winther, Ronny (2007) Reducing the athlete's aerodynamical resistance. JOURNAL OF COMPUTATIONAL AND APPLIED MECHANICS, 8 (2). pp. 163-173. ISSN 1586-2070

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Abstract

This paper presents an experimental investigation on the effect of surface roughness on athletes legs and arms. Because of their cylindrical shape, arms and legs of an athlete can be approximately studied as flow over circular bodies. The variation of roughness has been obtained using three different textiles and changing the diameter of the cylinder. To evaluate the results, three more textiles have been tested on the 20cm diameter cylinder. Two of them are utilized in two alpine suits used by the Norwegian alpine ski team and one is from a ski suit produced by Eschler. All the results have been compared with a cylinder with a smooth surface. The critical Reynolds number for a significant drop in the drag coefficient decreases by increasing surface roughness.

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