GENERAL-SOLUTION PROCEDURE FOR FLOWS IN LOCAL CHEMICAL-EQUILIBRIUM

This study details the derivation and application of an approximate Ri emann solver of the Roe type specifically designed for the numerical s imulation of inviscid and viscous now problems involving general and v irtually arbitrary mixtures of thermally perfect gases in local chemic al equilibrium. The solution procedure is by no means limited to airfl ows and will be applied to an oxygen/hydrogen mixture as well. A ''bla ck box'' solver for the local equilibrium composition of a gas mixture of known density and internal energy is coupled with the now solver, which is based on the newly derived flux-difference-split technique. A few test cases, including both external and internal flows, illustrat e the capabilities and the overall efficiency of the flow solver.