A hybrid large eddy simulation/Reynolds-averaged Navier-Stokes (LES/RANS) method was tested by computing transverse sonic injection in supersonic turbulent boundary layer. The method combined two-equation k-ω SST (shear stress transport) turbulence model and a mixed-scale sub-grid scale model for turbulence closure depending on wall distance and a blending function of local turbulent parameters. The results show that the hybrid method can capture the unsteady large scale structures of the jet/turbulent boundary-layer interaction. Also

it provides better predictions of separation region length

wall static pressure peak value and static pressure distribution in the expansion regions than the RANS method.