Volume 36 Issue 11
Nov.  2021
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Article Navigation >  Journal of Aerospace Power  > 2021  >  36(11): 2379-2388
GONG Lunkun, DENG Zhe, WEI Xiaolin. Ablation characteristics of carbon/phenolic at converging section in semi-submerged nozzle[J]. Journal of Aerospace Power, 2021, 36(11): 2379-2388. doi: 10.13224/j.cnki.jasp.20200413
Citation: GONG Lunkun, DENG Zhe, WEI Xiaolin. Ablation characteristics of carbon/phenolic at converging section in semi-submerged nozzle[J]. Journal of Aerospace Power, 2021, 36(11): 2379-2388. doi: 10.13224/j.cnki.jasp.20200413
shu

Ablation characteristics of carbon/phenolic at converging section in semi-submerged nozzle

doi: 10.13224/j.cnki.jasp.20200413
  • 1.

    Xi'an Modern Chemistry Research Institute，China North Industries Group Corporation Limited，Xi'an 710065，China

  • 2.

    Shanxi North Xing'an Chemical Industry Company Limited，China North Industries Group Corporation Limited，Taiyuan 030008，China

  • Received Date: 2020-09-30
  • Publish Date: 2021-11-28
    Abstract
  • By solid-gas heat coupled numerical method and the ALE （arbitrary Lagrangian-Eulerian） adaptive meshing technique，the ablation of carbon/phenolic at the converging section in semi-submerged nozzle was investigated，and the results were validated by comparing the results with the experiment data.The results showed that the Al/Al2O3 particles and droplets had great effect on the heat transfer and ablation process at the converging section.The effects of Al/Al2O3 on the ablation can be ignored when the gas traveled almost parallel to the surface.Based on the decomposition mechanism of phenolic，the ablation characteristics of carbon/phenolic can be predicted assuming that the fully charred material was ablated immediately，and the ablation rate was about 0.3 mm/s.The char formation process after the motor burnout was very important for the carbon/phenolic.The thickness of pyrolysis zone was about 2.0 mm during the operating process of the motor，and may increase to 4.0 mm considering the pyrolysis process after motor burnout.The ablation of carbon/phenolic in contact with the carbon/carbon throat can be enhanced owing to the heat flux through carbon/carbon throat heat transfer.

     

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