Abstract: We described a numerical method for the simulation of a complete 3-D hypersonic viscous flowfield (forbody and near wake) with ionization and in chemical nonequilibrium, The viscous and chemically reacting flow computations are based on a conservation form of the Navier-Stokes equations with the chemical source terms. The golbal colltinuity equation is replaced by the individual species conservation equations. For high temperature ionized air there are seven primary constituents which may be ordered as foll...