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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (S2): 729469-729469.doi: 10.7527/S1000-6893.2023.29469

• Near Space Technology • Previous Articles     Next Articles

Multiscale coupling simulation method for thermal protection material ablation based on thermochemical interfacial reactive model

Zhifan YE1, Jin ZHAO1(), Zhihui LI2, Xiangchun SUN1, Dongsheng WEN1   

  1. 1.School of Aeronautic Science and Engineering,Beihang University,Beijing  100083,China
    2.China Aerodynamics Research and Development Center,Mianyang  621000,China
  • Received:2023-08-15 Revised:2023-08-24 Accepted:2023-09-19 Online:2023-10-17 Published:2023-10-13
  • Contact: Jin ZHAO E-mail:jin.zhao@buaa.edu.cn
  • Supported by:
    National Natural Science Foundation of China(52006004)

Abstract:

Under hypersonic flow conditions, due to the strong high-temperature thermochemical non-equilibrium effect and various heterogeneous reactions occurring at the gas-solid interface, to achieve the aerothermal environment and material thermal response prediction with high accuracy becomes very difficult. In particular to the ablative Thermal Protection Material (TPM), thermal blockage and gas blowing effect may be caused by the physical and chemical interactions between TPM interface and the non-equilibrium flow environment, significantly affecting the aerothermal environment and material thermal response. In this work, a multiscale coupling simulation framework is established for the TPM ablation process, which not only can achieve the TPM recession rate and the transient re-shaping process of vehicles based on the thermochemical interfacial reactive model, but also is capable to capture the ablation generation development at the interface and its effect on the aero-thermal/-dynamics environments. Firstly, the establishment of the multiscale coupling simulation framework is described with details, followed by a benchmarking validation using a blunt body with Phenolic Resin (PR) as TPM. The results of the calculated ablation recession rate and the transient aerothermal environment are compared with literature to demonstrate the methodology validity. Such a multiscale coupling simulation method for TPM ablation based on the thermochemical interfacial reactive model is not only suitable for the PR material application, but can also be extended to other typical aerothermal environment prediction, which is of great help predicting hypersonic aerothermodynamic characteristics and improving the understanding of various TPM/non-equilibrium flow interfacial phenomena.

Key words: thermal protection materials, gas-solid interface, multiscale coupling simulation, reactive molecular dynamics, ablation

CLC Number: