Generalized reference enthalpy formulations and simulation of viscous effects in hypersonic flow (Q1271746)

We prove a generalized reference enthalpy formulation for the skin friction, heat transfer and radiation-equilibrium temperature distribution over aerodynamic surfaces in attached hypersonic/hyperenthalpic flow. The formulation provides adequate estimates of the heat transfer distribution under thermochemically active high enthalpy flow conditions when coupled to thermochemically active Euler solutions. The approach is used to reveal the relevant similitude parameters for viscous effects in hypersonic flow, and to show the importance of the temperature distribution across the boundary layer and of the temperature-viscosity relation.