後方ステップ流れのはく離・再付着現象に関する研究 : 第1報,再付着流れに及ぼす流路曲率の影響

概要

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The paper presents the behavior of a separating shear layer and its reattachment when an additional centrifugal body force due to streamline curvature is imposed on the shear layer. A curved channel is attached to a backward-facing step to obtain such a flow situation. In addition to he inherent stability within the conventional straight channel, the stabilizing and destabilizing effects on the reattachment process are given according to the direction of curvature. Three different surface configurations are used (flat, convex, and concave); with weak, mild, and strong surface curvature, the measurements were performed for seven separated cases. The reattachments point was determined by a thermal tuft probe. A hot-wire anemometer was used for the measurements of mean velocity and turbulence. Flow visualization of the shear layer was made by means of a smoke-wire method. Reynolds number based on step height was 8×10^4, curvature paramenter being in the rage -0.04<δ/R<0.05.
一般社団法人日本機械学会の論文
1984-12-25