Optimisation of stable flight posture of ski jumping based on computational fluid dynamics simulation technology

• Published in: Sports biomechanics pp. 1 - 20
• Main Authors: Yu, Jinglun, Liao, Zhangwen, Ma, Xinying, Qi, Shuo, Liang, Zhiqiang, Wei, Zhen, Zhang, Shengnian
• Format: Journal Article
• Language: English
• Published: 13.11.2023
• ISSN: 1476-3141; 1752-6116
• DOI: 10.1080/14763141.2023.2276329

The stable flight posture that affects sports performance during flight is usually formed by the multiple angles of the athlete-ski posture. At present, research on the flight phase is mainly based on the single-factor impact analysis based on computational fluid dynamics simulation technology, but studies on the multi-factor coupling relationship of two or more factors is less. This study aims to determine the best optimal-level combination based on the simulation model of this work through comprehensive evaluation from the optimisation perspective of multi-factor coupling. Here, a refined model of the athlete-ski system with the characteristics of ski jumping was established. Reynolds time-averaged method was used for the simulation. A three-factor and five-level simulation test was conducted on the relative inclination between skis, the angle between the body and the ski and the ski V-angle through orthogonal experiment design. Our results show that the optimal-level combination of the relative inclination between skis of 120°, the angle between the body and the ski of 20°, and the ski V-angle of 30° is relatively best in terms of aerodynamic characteristics. Simulation results were similar to the results of the winter field data from video analysis, and the results were effective.