Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 09, 2017 - November 11, 2017
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.
The Proceedings of Joint Symposium: Symposium on Sports Engineering, Symposium on Human Dynamics
