| Citation: | LI P，CHEN J Q，DING M S，et al. Simulaton of therochemical nonequilibrium and rarefied-slip flows for hypersonic flight vehicles[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（11）：3391-3401 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0870
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The rarefied slip effect has a significant impact on the aerodynamic characteristics of hypersonic vehicle. Based on HyFLOW software, velocity slip and temperature slip boundary conditions suitable for thermochemical nonequilibrium flows are constructed. Meanwhile, the rarefied slip flows over the usual hypersonic vehicles of the Orion reentry capsule, OREX experiment flight vehicle, and the Columbia OV102-like space shuttle are simulated, and the associated aerodynamic properties are also anticipated and studied. Research results indicate that the rarefied slip boundary model in HyFLOW software is reliable, and has high computational accuracy in predicting the aerodynamic and aerothermal characteristics related to coupling effects of thermochemical nonequilibrium and rarefied slip. It can meet the simulation application requirements of complex engineering configurations. In addition, the rarefied slip effect can significantly reduce the peak value of heat flux and its distribution area. The peak heat flow of the OV102-like space shuttle's nose is anticipated by the slip condition to be, at most, 45% less than that of the no-slip condition, and, at most, 20% less than that of the leading edge of the wing.
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