円柱の回転振動による渦放出のアクティブ制御に関する研究 : 流れ場と円柱回転の同時可視化計測による制御機構の検討

概要

論文の詳細を見る
The active control mechanisms of vortex shedding from a circular cylinder in a uniform flow by rotary cylinder oscillations are investigated by measuring the pressure distributions and by visualizing the flow around the cylinder with sampling the angular velocity of the cylinder simultaneously. Here, the rotary cylinder oscillations are controlled by the reference velocity signal in the wake with some phase lags. A clear reduction in the unsteady lift forces is observed by the active controls. The simultaneous observation of the phase averaged pressure distributions, the visualized flow fields and the cylinder rotations indicates that the rotary cylinder oscillations with the optimum phase control decelerate the accelerated flow on one side of the cylinder and accelerate the decelerated flow on the other side of the cylinder, which results in a reduction in the time-variation of shed circulations and forms the suppressed vortex pattern in the flow visualization pictures.
一般社団法人日本機械学会の論文
1996-01-25