セッションID: B-31
会議情報
主催: 一般社団法人 日本機械学会
会議名: スポーツ工学・ヒューマンダイナミクス2017
開催日: 2017/11/09 - 2017/11/11
ディンプル深さが回転するゴルフボールの空力特性に与える影響
（風洞実験とCFDの比較）
詳細
主催: 一般社団法人 日本機械学会
会議名: スポーツ工学・ヒューマンダイナミクス2017
開催日: 2017/11/09 - 2017/11/11
Aerodynamics of spinning golf balls were investigated by Wind Tunnel Test and Computational Fluid Dynamics at the wind speed of 25 and 40 m/s. For CFD analysis, turbulence model (k-ω SST) with transition γ-model was applied. As for both methods, a golf ball with shallower dimples has higher CL at U=40m/s while drastic reduction in CL was confirmed at U=25 m/s and Sp =0.1. The increase in CD as with the decrease in Sp was also confirmed at this CL reduction phase. It seems that the flow around golf ball changes from turbulent to laminar as with the decrease in Sp. Visualization of CFD results indicates that the separation point of the shallower ball upper side shifts forward for the condition of U=25m/s and Sp =0.1 compared with the other conditions.
