Investigation of Convective Heat Transfer Simula-tion Accuracy in Subsonic High-Enthalpy Air Flows in HF-Plasmatron

Abstract

Numerical estimations of correspondence between stagnation point heat fluxes to a cylindrical model in subsonic high-enthalpy air jet in HF-plasmatron and entry heating a blunt body in Earth atmosphere are performed in the case, when thermodynamic and hydrodynamic parame-ters of these absolutely different flows are in one-to-one correlation according to the concept of local heat transfer simulation. For cold wall case similarity of normalized heat fluxes is nu-merically confirmed in the whole range of a catalytic recombination coefficient, when conditions of local heat transfer simulation are satisfied. Through CFD modeling performed for HF-plasmatron subsonic tests and corresponding atmospheric entry conditions it is proved, that temperatures of radiative equilibrium surfaces of a model and blunt body are in a good and ac-ceptable agreement for high and low catalytic walls.