BOUNDARY LAYER STABILITY WITH MULTIPLE MODES IN HYPERSONIC FLOWS

摘要

Inviscid and viscous boundary layer stabilities in hypersonic flows, which are different from those in low speed flows, are investigated, and have actually multiple unstable modes due to inherent mathematic characters. Numerical integration with the singularity point is implemented by expanding calculation region onto the complex plane, and can avoid the difficulty in solving the inviscid stability equations. The high accurate numerical method of the parabolic stability equation (PSE) is used in spatial marching to solve the viscous stability equations. Computed results show good agreement with relevant data.