ロックイン状態の二次元円柱に作用する流体力 : 流体工学 , 流体機械

概要

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This paper describes the fluid force acting on the two-dimensional oscillating circular cylinder in the locking-in region. The experiment was carried out in an N. P. L, blow-down type wind-tunnel with a working section of 500 mm×500 mm×2000mm, and with the Reynolds number of 1.9×10^4. The cylinder was then forced to oscillate sinusoidally in the lift direction. The power spectrum of the fluctuating velocity in the wake behind a circular cylinder was measured to show the locking-in region in the present experiment. The time-mean pressure distribution and fluctuating pressure distribution on the circular cylinder were measured for the displacement in the vibration. Consequently it was found that the mean drag and fluctuating lift increase and become maximum in the locking-in region, while, the base pressure in the rear surface (θ=180°) of the cylinder becomes low and attains minimum.
一般社団法人日本機械学会の論文
2001-02-25