Control of supersonic cavity flow

Abstract

In this study, laser energy deposition is used as a flow control technique. The effects of laser energy deposition over an open rectangular supersonic cavity flow to realize the capability of the energy deposition for reduction of the pressure fluctuations and relative sound pressure levels are examined numerically. The simulations are performed for the cases both with and without energy deposition for unsteady flow over a two dimensional cavity at a free stream Mach number of 1.5. The length to depth ratio of the cavity (L/D) is 5.07 which represents an open cavity configuration. The Reynolds-averaged compressible time dependent Navier Stokes equations in two dimensions are solved using the flow solver ANSYS Fluent. The k-w model is used as a turbulence model. The application of the laser deposition is modeled by using the Gaussian temperature profile assuming the density within the spot is initially uniform. The results obtained from the simulation performed for 5mJ of energy show that laser energy deposition provides small reduction for SPL values. Also, the impacts of frequency, location, and amount of laser energy deposition will be investigated and the results will be presented in the final paper.