溝つき円柱まわり流れの数値シミュレーション : 溝の深さによる比較

概要

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It is well-known that the dimples on the surface of a golf ball increase its flying distance. The boundary layer on the surface of a golf ball is disturbed by dimples and changes from laminar to turbulent flow, so the separation point on the surface moves downstream and decreases drag. But the detailed mechanism of the effect of flow by the dimples has not been made clear. Therefore, up to now, the number and shape of the dimples have been determined by experimental data. The purpose of this research is to make clear the mechanism of this flow through computation and experiment, by varying the number and sectional shapes of the dimples represented by grooves put on the surface of a circular cylinder. This paper deals with the effect on the depth of the grooves. For solving the Navier-Stokes equation, the computation was performed using the QUICK method. The grooves were formed with three different depths and 32 grooves. The results by computation agree qualitatively with the experimental results of surface pressure measurement.
東海大学の論文
1993-03-30