Volume 39 Issue 10
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HAN Jianing, ZHOU Chenchu, LU Jiawei, et al. Simulation on filling process of gas generator head with gas injecting[J]. Journal of Aerospace Power, 2024, 39（10）：20220772 doi: 10.13224/j.cnki.jasp.20220772
Citation: HAN Jianing, ZHOU Chenchu, LU Jiawei, et al. Simulation on filling process of gas generator head with gas injecting[J]. Journal of Aerospace Power, 2024, 39（10）：20220772 doi: 10.13224/j.cnki.jasp.20220772
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Simulation on filling process of gas generator head with gas injecting

doi: 10.13224/j.cnki.jasp.20220772
  • 1.

    School of Astronautics，Beihang University，Beijing 102206，China

  • 2.

    Science and Technology on Liquid Rocket Engine Laboratory，Xi’an Aerospace Propulsion Institute，Xi’an 710100，China

  • Received Date: 2022-10-08
    Available Online: 2024-03-27
    Abstract

  • Based on the starting process of high-pressure combustion liquid oxygen kerosene rocket engine, the filling process of the head cavity of the gas generator with gas injecting was studied. Firstly, experiments indicated that the coefficient n required for the Marquinelli empirical relation was determined to be 2.29, which verified the accuracy of the empirical relationship. Secondly, the finite element segmentation was used to establish a one-dimensional distribution parameter model of the head cavity of the gas generator with gas injecting, and the experimental data were compared and analyzed with the empirical relationship and the simulation results of the one-dimensional distribution model, which proved the accuracy of the model. The results showed that the error between steady-state pressure and the mean value of experimental data of the one-dimensional distribution parameter model was 0.429%, and the error of the empirical relationship (centralized parameter model) was 1.464%; the flow area of the injecting increased, the pressure built into the head cavity slowed down, and the stable pressure value decreased; the volume of the head cavity increased, and the pressure building speed slowed down, but the pressure stability value was kept unchanged; the resistance coefficient of the head cavity increased, and the pressure stability value and filling speed decreased.

     

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