Passive Control of the Pressure Oscillations in Supersonic Cavity Flows

A computational fluid dynamics method has been applied to investigate the intense pressure oscillations that occur in a rectangular cavity at Mach number 1.83. Special consideration has made to get a passive control strategy which can effectively suppress the cavity pressure oscillations. The leading edge extension of rectangular cavity has been selected as a passive geometry for the present control method. In the present computations, a third-order TVD (Total Variation Diminishing) finite difference scheme with MUSCL was used to discretize the spatial derivatives and a second order-central difference scheme for the viscous terms, and a second-order fractional step was employed for time integration. The results obtained showed a considerable decrease in the amplitudes of pressure oscillations with the present control.