 unsteadi obliqu interact shock wave plane disturb unsteadi obliqu interact shock wave plane disturb analysi flow field produc obliqu imping weak plane disturb arbitrari profil plane normal shock three type disturb consid move sound wave refract simpl isentrop sound wave attenu isentrop pressur wave depend angl shock incid sound wave stationari vortic wave constant pressur appear shock reflect sound wave stationari vortic wave produc shock incid wave refract stationari vortic wave sound wave attenu pressur wave produc comput present type incid wave rang incid angl shock mach number 1 1 5 