STAGNATION POINT COMPUTATIONS OF NONEQUILIBRIUM INVISCID BLUNT-BODY FLOW

The numerical solution of a symmetric hypersonic blunt body flow in tw o space dimensions is considered, and the problem of arising chemical boundary layer is discussed. Analytical and numerical investigations a re used to analyze the solution on the stagnation point streamline. We point out the necessary assumptions to obtain an equivalent system of ordinary differential equations along this line and to get a unique s olution. We also describe the situation in the limiting case at the st agnation point and give a differential algebraic system from which we obtain the solution at this point. We derive the shape of the boundary layer by linearizing the equations and some of the results are differ ent to previous ones. Then we present numerical tools to obtain a bett er indication of this boundary layer even in 2-D calculations.