二次元非圧縮キャビティ自励振動流れのマイクロジェットによる制御

抄録

We present two-dimensional incompressible direct numerical simulation of the suppression of open cavity flow oscillation by using leading-edge microjet blowing. The cavity aspect ratio L/D is 2.0, where D is the cavity depth and L is the cavity length. The width of microjet that is located at just below the cavity leading edge is 0.01D . The velocity of microjet is varied from 0.0 to 1.0 at 0.1 intervals. As increasing microjet velocity from 0.0 to 0.2, the amplitude of selfsustained oscillation decreases. The self-sustained oscillation is completely suppressed when the microjet velocity is from 0.3 to 0.5. The cavity shear layer oscillates again when the microjet velocity is 0.6 or higher.