Hypersonic Low-Density Aerothermodynamics of Orion-Like Exploration Vehicle

摘要

In the framework of Research Task Group 043 of the NATO Research and Technology Organization, an analysisnof the capabilities in prediction of aerothermal loads acting on a crew exploration vehicle at the higher altitudes of itsnreentry trajectory has been performed. In particular, the focus of this investigation is to provide information wherenoverlap between the continuum approach (i.e., computational fluid dynamics) and particle approach (i.e., directnsimulation Monte Carlo) occurs and improves understanding of relevant physics in transitional regime.nComputational fluid dynamics calculations with slip flow boundary conditions had shown good predictingncapabilities of slip velocity, slip temperature, and pressure, but not the surface heat flux. The analysis of thencontributions to the total surface heat flux had exhibited the lack of continuum model in evaluating the convectivenheat flux in the transitional zone of the Orion reentry trajectory and an underestimation of shock wave thickness.