平面壁と二次元円柱との干渉 : 境界層厚さの影響

概要

論文の詳細を見る
The interference effect on the thickness of the turbulent boundary layer and the gap height between a two-dimensional circular cylinder and a plane wall was experimentally investigated. The increment of the thickness of the turbulent boundary layer reduced the increasing rate of the time-mean drag force with respect to the increasing gap ratio, while being not notable in the time-mean lift force. it was also found that the fluctuating fluid forces became negligibly small in the case of δ/d=0.34, when the gap ratio s/d was 0.3, δ being the thickness of the boundary layer, d the diameter of the cylinder and s the gap height, respectively. This characteristic of the interference flow was induced by the laminarization of the turbulent flow around the cylinder in the above conditions. such a striking feature became, however, obscure as the thickness of the boundary layer increased.
一般社団法人日本機械学会の論文
1986-11-25