Instability of non-parallel compressible boundary Layer

Linear compressible stability of non-parallel boundary layer is studied using the parabolized stability theory. Evolution of disturbances in a hypersonic flow around a sharp cone of zero angle of attack is studied for freestream Mach number 8.0. The parabolized stability equations are solved using the backward second order finite difference scheme in a streamwise direction, and fourth order two point scheme in a wall-normal direction. The influence of nonparallelizm on the first and second mode disturbances, respectively, is analysed.