AN EFFICIENT INTERACTING BOUNDARY-LAYER METHOD FOR SUPERSONIC-FLOW INTHE TRANSONIC REGIME

A quasi-simultaneous interacting boundary layer (IBL) method with alte rnating direction explicit acceleration is extended to include the non linear weak-shock branch of a nonlinear transonic viscous-inviscid int eraction. This IBL scheme is valid for an inviscid flow which is super sonic everywhere as the free-stream Mach number (M(infinity)) approach es one. Solutions computed by this method are compared with transonic triple-deck solutions for expansion ramps as M(infinity) --> 1. The co nvergence rate of the method is found to be comparable to an identical ly accelerated scheme with a linear supersonic interaction law. Soluti ons for a parabolic hump on a flat plate are also given which show the development of a growing region of separation behind the hump as M(in finity) --> 1.