2336 超音速キャビティ流れの自励振動に及ぼすキャビティ内プレートの影響(S46-1 圧縮性流れの基礎と応用(超音速流1),S46圧縮性流れの基礎と応用) 2336 Effect of the Leading Edge Plate of Cavity on Cavity-Induced Acoustic Oscillations in Supersonic Flow

A computational investigation has been carried out to determine the effectiveness of plates fitted horizontally and vertically to suppress cavity-induced acoustic oscillations in supersonic flow. The results showed that the introduction of plates in a square cavity changed the flow field in a favorable way such that the upstream compression waves became weaker and the disturbance of the shear layer by the reflected compression waves was not strong enough to regenerate the instability waves to sustain the process by completing the feedback loop. The results also showed that, resultant amount of attenuation of acoustic oscillations was dependent on the depth of the vertical plate used as an oscillation suppressor.