流れのパッシブ制御による矩形断面柱の流体力の抑制 : 第1報,正方形柱の場合

概要

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The objective of the present study was to investigate the suppression of the fluid forces acting on a square prism by passive control of the flow around it. The flow control was established by introducing a fine flat plate upstream of the prism. Measurements were carried out by varying the position of the flat plate in the ranges of S/W=0〜3.0 (S : distance between the flat plate and square prism, W : width of square prism and width of the flat plate ranging from 2 to 8 mm. Then, the steady and unsteady fluid forces, vortex shedding frequency and flow pattern were systematically examined. As a result, it was found that the maximum reduction of the time-averaged drag was 75%, and maximum reduction in the fluctuating lift and drag were 95% and 80%, respectively, using the flat plate with the width of 4 mm, which is considerably smaller compared to the square prism with the width of 42 mm.
一般社団法人日本機械学会の論文
1995-08-25