高レイノルズ数の厚板後流のフィードバック制御に関する-模擬計算(流体工学, 流体機械)

概要

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A two-dimensional numerical simulation of feedback control of a thick flat-plate wake in a high Reynolds-number region was performed using the discrete vortex method. The transverse velocity component on the wake centerline was used as a feedback signal, and the feedback input was given to two separating shear layers at the trailing edge of the plate. A fair amount of reduction in periodic velocity fluctuations typically occurred when the feedback sensor was located downstream at a distance 2.7 times the plate thickness, while the total turbulence energy in the wake was not greatly affected by the feedback. The dominant frequency in the wake changed rapidly or almost discontinuously as the sensor location passed through the critical location.
一般社団法人日本機械学会の論文
1997-08-25