Journal of System Simulation ›› 2021, Vol. 33 ›› Issue (12): 2820-2827.doi: 10.16182/j.issn1004731x.joss.21-FZ0838

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Real-time Simulation Technology of Fluid-thermo-solid Coupling of Hypersonic Vehicle

Liu Yunqin1, Li Ni1, Zhao Luming1, Bai Jinpeng2, Li Tingjun2, Wang Chenguang2   

  1. 1. School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China;
    2. Key Laboratory of Aviation Science and Technology of Air Combat System Technology, Shenyang 110035, China
  • Received:2021-06-08 Revised:2021-08-18 Online:2021-12-18 Published:2022-01-13

Abstract: The solution of the coupling characteristics of fluid-thermo-solid physics in the modeling of hypersonic vehicle is an unavoidable difficulty, and the real-time simulation of fluid-thermo-solid coupling is particularly challenging. Aiming at the conflicting problem of solution accuracy and solution efficiency in fluid-thermo-solid coupling real-time simulation, a CFD (Computational Fluid Dynamics)/ CSD (Computational Structural Dynamics)-based fluid-thermo-solid coupling characteristic solution method is established, which realizes the high-precision solution of the fluid, temperature, and structural deformation field coupling. According to the multi-condition offline solution set modeling method, by accumulating a large number of offline solutions as effective support for online calculation, the contradiction between solution accuracy and solution efficiency is balanced. A virtual flight test is carried out to analyze the influence of the coupling effect on the angle of attack and net thrust of the aircraft, and compared with NASA experimental data to verify the correctness of the model.

Key words: hypersonic vehicle, fluid-thermo-solid physics coupling, real-time simulation, multi-condition offline solution set, virtual test flight

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