Abstract
In order to study the flow characteristics and the heat flux of cavity with length-to-depth ratio of 6 on the surfaces of the hypersonic reentry aerospace vehicles in rarefied gas flow, Direct Simulation Monte Carlo method (DSMC) with the adaptive grid is used. The free stream at a Mach Number of 8, an altitude of 60 km, and the angles of attack (AOA) ranging from 0° to 60°.The results show that the closed cavity changes its type when AOA changes and is back to closed type when AOA is 60°. Increasing AOA sometimes does not help free-stream to get into the cavity because the stream strikes the plate on the front edge of the cavity, and form a shock wave that changes the direction of the free-stream flow. The low-speed and high pressure region inside the cavity extends to the upper zone of the cavity due to the shock wave, the speed is getting smaller and the pressure is getting higher. When AOA is 40° and 50°, the heat flux of three surfaces of the cavity is higher than other situation.
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Xiang, S., Fang, S. (2022). DSMC Study for Effects of Angles of Attack on Closed Cavity of Space Vehicle in Hypersonic Rarefied Flow. In: Ding, H. (eds) Aerospace Mechatronics and Control Technology. Springer Aerospace Technology. Springer, Singapore. https://doi.org/10.1007/978-981-16-6640-7_4
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DOI: https://doi.org/10.1007/978-981-16-6640-7_4
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