| Citation: | WANG Fei, WANG Qinyang, SUN Chuang, et al. Optimization design and performance for multi-layer thermal protection structure at high temperature[J]. Journal of Aerospace Power, 2023, 38（5）：1075-1082 doi: 10.13224/j.cnki.jasp.20210601
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In consideration of the intense aerodynamic heating during the flight of the high speed vehicles, the heat transfer process of a multi-layer thermal protection structure designed in the sequence of “high-temperature thermal protection layer + thermal insulation buffer layer + core thermal insulation layer” was investigated, and a one-dimensional unsteady thermal conductivity-radiation coupled heat transfer model was established inside the thermal protection structure at high temperature environment. The temperature profile of each layer of the thermal protection structure at high-temperature environment was obtained by numerical simulation. Based on the difference of thermal insulation performance of various thermal protection materials, the optimal design scheme with the total mass and thickness of the lightweight multi-layer thermal protection structure as the objective function under certain constraints was proposed, the optimal geometric parameters of the multi-layer structure were obtained, and the anti-insulation performance of the optimized thermal protection structure was verified experimentally. The experimental results showed that the optimized thermal protection structure can withstand 1 473 K for 1 800 s while the back temperature was kept below 370 K.
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