平面壁上に直立する有限幅多孔平板まわりの流れ : 第2報, 平板のアスペクト比と開口比の影響

概要

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The flow around a permeable rectangular plate with the aspect ratio w/h and the open-area ratio β, standing vertically against a flat Wall on which a turbulent boundary layer is developing, was investigated experimentally. The surface pressure distribution on the flat wall and the flow visualization by both smoke-wire and oil-film techniques clarified the following. The circulation region behind the permeable rectangular plate was moved downstream with increase of both the open area ratio and the width of the plate, and disappeared for a large open-area ratio. The critical values of the open-area ratio in which there is a circulation region behind the present plates are between 0.325 and 0.485, and become large with increasing aspect ratio. The reattachment distance on the x axis behind the plate can be effectively estimated by both w/h and β. It seems that the wall pressure distributions on the x axis normalized by both the reattachment distance and the maximum suction pressure in the circulation region become similar for the range of 0.5≦w/h≦4 and β≲0.196.
一般社団法人日本機械学会の論文
1992-02-25