Shock/Viscous Interaction Effects on Nonequilibrium-Dissociated Heating Along Arbitrarily Catalytic Surfaces

How shock interaction affects heat transfer in nonequilibrium-dissociated flows arising for either impinging shocks within hypersonic inlets or control surface-generated shocks on aerodynamic vehicles is studied using a first-order asymptotic analysis based on a triple-deck model generalized to include a nonequilibrium-dissociated gas phase and an arbitrary degree of surface atom catalysis at nonadiabatic wall temperatures. It is found that the interaction zone gas phase chemistry may be taken as locally frozen while its upstream history can be readily accommodated into the theory. The influence of finite surface catalycity is characterized by a new interactive heterogeneous Damkoehler number different from that of noninteractive flows. A new Crocco-like integral of the interactive species/energy equations is identified and used to derive a closed-form analytical solution for the local diffusive heating on an arbitarily-catalytic surface. (AIAA)