開いたキャビティを過ぎる自励振動流の底面駆動法を用いた制御の三次元直接数値計算(流れの制御(3),一般講演)

概要

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In this study, we investigate the control of self-sustained oscillating flows over open cavities using a moving bottom wall. The three-dimensional incompressible Navier-Stokes equations are solved using finite difference method. A series of simulation are performed for a variety of bottom wall velocity from u_w=-0.1 to u_w=-1.0 at 0.1 interval with a length-to-depth ratio of L/D=2.0. The results show that velocity fluctuations and pressure fluctuations are suppressed due to shear stress on bottom wall of cavity for u_w=-0.1 to u_w=-0.9. The most effective condition of bottom wall velocity is u_w=-0.4. The control method by moving bottom wall can suppress self-sustained oscillating flows over cavity.
日本流体力学会の論文
2010-09-09