Numerical simulation is conducted to evaluate the wind and posture effects on the aerodynamic performance of a skier during the flight stage. Both steady and unsteady models are applied on a 2D geometry. Using the Fluent code, the fundamental equations of fluid flow are solved simultaneously. In particular we focus on the influence of wind speed and direction on aerodynamic forces with several different postures of the skier in steady modeling. For a chosen case, the unsteady models are used to predict the transient characteristics of streamline distributions and aerodynamic forces. It is found that the skier’s postures, wind speed, and direction play a significant role. The wind condition affects the pressure force (the form drag) on the skier and makes it a resistance or thrust regarding wind directions. The optimized posture with a minimization of resistance under a facing wind is determined as a moving-forward body of the skier. The unsteady modeling reveals that the wake around the skier and aerodynamic forces are strongly dependent on time. This initial study not only provides a qualitative and theoretical basis for the athletes to understand the effects of wind and postures, and then to optimize their postures according to the wind condition during the flight stage of skiing, but also builds the foundation for the systematic study of skiing process with more advanced CFD models in the future.
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e-mail: hafang@gmail.com
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September 2011
Research Papers
The Effects of Wind and Posture on the Aerodynamic Performance During the Flight Stage of Skiing
Zhifeng Chen,
Zhifeng Chen
Zhejiang College of Construction, Hangzhou 311231,
China
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Haisheng Fang
Haisheng Fang
School of Energy and Power Engineering,
e-mail: hafang@gmail.com
Huazhong University of Science and Technology
, Wuhan 430074, China
Search for other works by this author on:
Zhifeng Chen
Zhejiang College of Construction, Hangzhou 311231,
China
Haisheng Fang
School of Energy and Power Engineering,
Huazhong University of Science and Technology
, Wuhan 430074, China
e-mail: hafang@gmail.com
J Biomech Eng. Sep 2011, 133(9): 091001 (5 pages)
Published Online: October 4, 2011
Article history
Received:
June 2, 2011
Accepted:
August 26, 2011
Online:
October 4, 2011
Published:
October 4, 2011
Citation
Chen, Z., and Fang, H. (October 4, 2011). "The Effects of Wind and Posture on the Aerodynamic Performance During the Flight Stage of Skiing." ASME. J Biomech Eng. September 2011; 133(9): 091001. https://doi.org/10.1115/1.4004947
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