Numerical anaysis of supersonic cavity flow

In this research, internal carriage of stores which is modeled by supersonic rectangular cavity is studied according to explain turbulent, unsteady and complex flow field in the cavity region. High speed flows over open cavities can produce complex unsteady flow fields that are important practical concern in aerospace applications. Therefore to understand the nature of the supersonic flow over an open cavity numerous numerical and experimental studies are performed.In this study, two and three dimensional simulations are performed. Unsteady, compressible and time dependent Reynolds-Averaged Navier-Stokes (URANS) equations are solved for supersonic cavity flow. The effects of numerical parameters and cavity length to depth ratio effects are investigated. The results of the CFD analyses are compared by using the experimental values which are obtained from the experiment with the same flow parameters, for sound pressure levels (SPL) and pressure coefficient distribution given in literature.Supersonic cavity flow physics and flow nature is analyzed. Two dimensional and three dimensional simulation results are compared with each other and it is stated that three dimensional effects cannot be neglected. High speed flow over the cavity creates complex, unsteady and difficult flow field. In this complex flow field, pressure fluctuations and resonance takes place. Cavity length has an important effect on the cavity flow.