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Optimisation of stable flight posture of ski jumping based on computational fluid dynamics simulation technology
Jinglun Yu1,2, Zhangwen Liao3, Xinying Ma4
1Key Laboratory of Exercise and Health Sciences of Ministry of Education, Shanghai University of Sport, Shanghai, China.
Sports Biomechanics
|November 13, 2023
Summary
Optimizing ski jumping performance requires understanding multi-factor athlete-ski posture. This study identifies the best combination of ski inclination, body-ski angle, and V-angle for superior aerodynamic characteristics.
Area of Science:
- Sports Science
- Aerodynamics
- Biomechanics
Background:
- Stable flight posture is crucial for ski jumping performance.
- Previous research primarily used single-factor analysis, neglecting multi-factor interactions.
- Understanding the coupling effects of athlete-ski angles is essential for optimization.
Purpose of the Study:
- To determine the optimal combination of athlete-ski posture angles for enhanced aerodynamic performance.
- To investigate the multi-factor coupling relationship influencing ski jumping flight.
- To develop and validate a simulation model for athlete-ski system optimization.
Main Methods:
- Established a refined computational fluid dynamics (CFD) model of the athlete-ski system.
- Employed the Reynolds-averaged Navier-Stokes (RANS) method for aerodynamic simulations.
- Utilized an orthogonal experimental design for a three-factor, five-level simulation test.
Main Results:
- Identified an optimal combination: 120° ski inclination, 20° body-ski angle, and 30° ski V-angle.
- This combination demonstrated superior aerodynamic characteristics compared to other tested configurations.
- Simulation results showed good agreement with field data from video analysis.
Conclusions:
- The identified optimal athlete-ski posture significantly improves aerodynamic efficiency in ski jumping.
- Multi-factor coupling analysis provides a more comprehensive approach to optimizing sports performance.
- The validated simulation model can be used for further research and athlete training.
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