1403 縦横比 1 以上の角柱の抗力軽減におけるエッジの切落し効果について

概要

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The purpose of this paper is to show the experimental results concerning with the drag reduction of square prisms due to the cutout of the rectangular shape at their front edges. The drag coefficient, the lift coefficient, the Strouhal number, and the base pressure coefficient are measured for various angles of attack from 0°to 25°and for various length and breadth ratio from 1 to 4. The velocity distribution around the square prism is measured by X-type hot wire anemometer. The present experiment shows : (1) The cutout of the edges is very effective. (2) The effect of the drag reduction due to the cutout is large near the zero angle of attack, and the drag coefficient becomes small more than that of the circular cylinder. (3) The global flow in the wake around the prism with the cutout is almost the same in the case of various length and breadth ratios
社団法人日本機械学会の論文