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Proceedings 2018, 2(6), 310; doi:10.3390/proceedings2060310

An Empirical Model of Aerodynamic Drag in Alpine Skiing

1
Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, Center for Sport Facilities and Technology, 7491 Trondheim, Norway
2
Department of Energy and Process Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
Presented at the 12th Conference of the International Sports Engineering Association, Brisbane, Queensland, Australia, 26–28 March 2018.
*
Authors to whom correspondence should be addressed.
Published: 14 February 2018
Download PDF [951 KB, uploaded 14 February 2018]

Abstract

This paper describes an empirical model of aerodynamic drag for a range of body positions commonly used in alpine skiing. In order to calculate the drag coefficient (CD), a method for calculating the frontal area of an alpine skier, inside a wind tunnel, was used with an uncertainty of 0.012 m2. The general model for aerodynamic drag was based on measurements from one alpine skier. To make the model applicable for athletes of different body sizes and shapes, an investigation of individual adjustments of the model was made, based on measurements of four alpine skiers. The results showed a variation of ±1.4% in the drag coefficient between the different subjects. The frontal area in a reference position was considered a suitable scaling variable. Validations showed an uncertainty of ±3% for the individually adjusted model.
Keywords: alpine skiing; aerodynamics; drag; drag area; drag coefficient; frontal area alpine skiing; aerodynamics; drag; drag area; drag coefficient; frontal area
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Elfmark, O.; Bardal, L.M. An Empirical Model of Aerodynamic Drag in Alpine Skiing. Proceedings 2018, 2, 310.

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