溝付円柱の溝形状変化に対する流動特性(S22-3 物体周り流れの制御-1,S22 流れ制御の技術)

概要

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This paper describes flow characteristics for circular cylinder with grooves of different type. The purpose of this study is to clarify the surface structure in relation to the effectiveness of drag reduction, and the mechanism of drag reduction. Circular cylinders with 32 grooves in the direction of the span were used in this study. The grooves took one of three shapes (arc, triangle, square). The pressure of the surface was measured with a semiconductor pressure transducer at Re=0.4×10^5〜3.9×10^5. The drag coefficient was calculated from the pressure distribution and the numerical analysis. The vortex shedding frequency at wake flow area was measured with hot-wire anemometer. It was clear that the drag coefficient were dependent on the shapes of the grooves.
一般社団法人日本機械学会の論文
2004-09-04