CFD Analyses of Hypersonic Flow Regimes with Stephan-Maxwell Diffusion Equation

摘要

This study emphasizes the diffusion models in hypersonic flow solver. In hypersonic flow regimes, species activities are very high due to high pressure and temperature. In order to analyze their movements, a diffusion model has to be used in such solver. Stefan-Maxwell Diffusion Equation is used in this study since it gives more realistic results than the basic diffusion law like Fick's Law of Diffusion. Three dimensional steady state Navier-Stokes Equations are used with a chemical reaction model. Also, the equations has to be satisfied the Continuum Approach, thus the altitude is selected 40 km and the free stream Mach Number is selected 10.18. It was found out that, using a complex model like Stefan-Maxwell improves the results compared to analyses without any diffusion model. Especially, in the stagnation region, the temperature decreases in the diffusion model case. Thus, this analyses can effect the design of the space craft