空気輸送のシミュレーションのための実験研究 : 第1報,線形乱流せん断流中の円柱に働く流体力

概要

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The present experimental study was undertaken to answer demands for some basic data in the numerical simulation of pneumatic conveying. In this first report, the fluid forces applied on a circular cylinder in a linear turbulent shear flow were investigated by the pendant method and he measurement of pressure distribution on circular cylinders. The experiment was carried out using a vertical duct. The effects of the velocity gradients of the mean flow and the Reynolds number on the drag and lift were discussed. The following conclusions were obtained : (1) Lift was applied in the direction from the higher velocity side of the approaching flow to the lower velocity side on a circular cylinder in a linear turbulent shear flow. The coefficient of lift increased as the velocity gradient became sharper. (2) Both coefficients of drag and lift increased as the Reynolds numbers became higher and the turbulence of the duct flow became greater. As a result, the basic data of coefficients of drag and lift are proposed for the Reynolds numbers Re_<.c>=3 300〜13 000.
一般社団法人日本機械学会の論文
1989-07-25