Parametric Study of High Speed Cavity flows

摘要

Flow past a cavity is of great academic and engineering interest, owing to its fundamental physics of fluid dynamics and practical applications like weapon bay of air borne vehicles and sunroof on cars etc.In aerospace applications,cavities may cause episodic flow oscillations thus structural vibrations and acute noise, resulting in human discomfort and material fatigue.The extensive applications and need for control measures to limit the noise makes it very much important to study the physics behind cavity oscillations.Flow over cavities characterized by an unsteady shear layer, vortex shedding,intense acoustic levels, and mixing of recirculation eddies with shear layer..A parametric study has been carried out to understand the effect of inflow Mach number and boundary layer thickness on flow characteristics for a two-dimensional cavity.The results reveals that cavity oscillation features will change with changes in inflow Mach number and boundary layer thickness.