Large eddy simulation of supersonic turbulent mixing layer

Abstract

A Large Eddy Simulation (LES) method is developed to simulate the supersonic turbulence mixing layer. The 7th-order upwind compact difference scheme and the modified Smagorinsky eddy viscosity model are adopted in the LES method developed here. Four sets of grid have been used to investigate for the investigating of the grid sensitivity for the LES. As a finer grid is used, a greater fraction of the turbulence spectrum is obtained directly. In comparison with the RANS method, the pulsating characteristic of the supersonic mixing layer is well simulated by the LES method.