NUMERICAL-ANALYSIS OF WALL PRESSURE AND HEAT-FLUX FLUCTUATIONS IN SHOCK-TURBULENT BOUNDARY-LAYER INTERACTION

The unsteady, compressible, Reynolds-averaged Navier-Stokes equations are solved numerically for an oblique shock-wave-induced turbulent bou ndary layer separation. For the freestream Mach number 6 and the frees tream Reynolds number 66.1 X 10(6) m-1, a time-dependent computation i s performed, using MacCormack's explicit-implicit finite difference me thod with 82 x 42 grid points. A two-layer eddy viscosity turbulence m odel is employed in conjunction with a relaxation modification. Compar isons of the mean wall pressure and the mean heat transfer coefficient with the available experimental results are made and the evaluation o f unsteady data for surface pressure and heat flux fluctuations is pre sented. It is found that the fluctuations in heat flux have qualitativ ely the same features as those of wall pressure but are different quan titatively.