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自転車競技の集団走行に対する大規模空力解析

A Large-scale aerodynamics study on bicycle racing

青木 尊之*; 長谷川 雄太  

Aoki, Takayuki*; Hasegawa, Yuta

LESに基づくCFD計算を用いて自転車競技の空力解析を行った。単独での走行および2$$sim$$4人の集団走行では、算出された抗力は風洞実験と良く一致した。競合する2集団の走行について、集団内の選手の配置を複数検討した。72人の選手の集団走行として、GPUスーパコンピュータで22.3億格子を用いた大規模空力解析を実施した。

Aerodynamics studies for bicycle racings have been carried out by using a CFD simulation based on LES model. For running of alone cyclist and 2-4 cyclists groups, the computational drags are in good agreement with the wind-tunnel experiments. Different shapes of group running and competing two teams are studied. A large-scale computation for a group of 72 cyclists has been performed by using 2.23 billion meshes on a GPU supercomputer.

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