Self Sustained Oscillations for Square Cavities at Yaw

Abstract

An experimental study was conducted to determine the characteristics for a compressible turbulent flow over square cavities at yaw. Flush-mounted dynamic pressure transducers for mean and fluctuating pressure measurements were installed along the chordwise direction. The self-sustained oscillation phenomenon was examined by spectral density function. For a fixed yaw angle, the ratio of the incoming boundary layer thickness to the depth of the cavity has an evident influence near the rear corner of cavity, including the trailing-edge expansion and the maximum pressure fluctuations.