NUMERICAL SIMULATION OF CROSSING SHOCK WAVE/TURBULENT BOUNDARY LAYER INTERACTION

Numerical simulations have been captured for 3-D crossing shock wave/turbulent boundary layer interactions generated by 15-deg sharp fins mounted symmetrically on a flat plate at mach8.3. The full Reynolds-averaged Navier-Stokes equations are solved with high-resolution implicit finite-volume scheme. Turbulence closure is achieved with Spalart-Allmaras(SA), Wilcox' k-omega and Menter's Shear Stress Trans-port (SST) models. Complex crossing shock wave interactions, flowfield structures including the boundary-layer separation, centerline vortex, vortex interaction and entrainment flow have been revealed. Comparisons for profiles of the velocity vector, pressure and heat transfer distribution have been observed between calculated results and experimental measurements. Behavior of turbulence models in the complex flow have been pointed out. SST shows better performance in calculating the pressure and the velocity vector and all turbulence models over-predicted heat transfer coefficient.