Numerical investigation of supersonic injection using a Reynolds-Stress turbulence model

The full, three-dimensional Favre-averaged Navier-Stokes equations, coupled with the second-order Zhang et al. (Zhang, H., So, R., Gatski, T., and Spe ziale, C.,"A Near-Wall Second-Order Closure for Compressible Turbulent Flow s," Near-Wall Turbulent Flows, edited by R. So, C. Speziale, and a. Launder , Elsevier, New York, 1993, ppt 209-218) Reynolds-stress turbulence and K-e psilon models, were used to numerically simulate a 25 deg, Mach 1.8 injecti on into a Mach 3.0 crossflow. Detailed comparisons with experimental data w ere performed. Analysis of the Reynolds-stress turbulence model simulation results revealed physically consistent and accurate predictions for mean fl ow and turbulent quantities, whereas the simulations with the K-epsilon mod el resulted in nonphysical and inconsistent turbulence predictions. Analysi s of the three-dimensional flowfield simulation with the Reynolds-stress tu rbulence model shows that the shock structure downstream of the oblique bar rel shock was a mirrored Image of the leeward side of the oblique barrel sh ock. Furthermore, the downstream location where vortical motion was initiat ed in the jet plume was caused by the recompression shock-induced vortices. These vortices were generated through the combined effects of the inflow a ir upwash behind the plume and the mirrored oblique barrel shock.