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有气体吹入的燃气发生器头腔充填过程仿真

韩佳宁 周晨初 陆嘉伟 于锐渤 张黎辉

韩佳宁, 周晨初, 陆嘉伟, 等. 有气体吹入的燃气发生器头腔充填过程仿真[J]. 航空动力学报, 2024, 39(10):20220772 doi: 10.13224/j.cnki.jasp.20220772
引用本文: 韩佳宁, 周晨初, 陆嘉伟, 等. 有气体吹入的燃气发生器头腔充填过程仿真[J]. 航空动力学报, 2024, 39(10):20220772 doi: 10.13224/j.cnki.jasp.20220772
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

有气体吹入的燃气发生器头腔充填过程仿真

doi: 10.13224/j.cnki.jasp.20220772
详细信息
    作者简介:

    韩佳宁(1999−),男,硕士生,主要从事液体火箭发动机系统仿真研究

    通讯作者:

    张黎辉(1966−),女,副教授,博士,主要从事液体火箭发动机系统设计、仿真和优化研究。E-mail:zhanglihui@buaa.edu.cn

  • 中图分类号: V434

Simulation on filling process of gas generator head with gas injecting

  • 摘要:

    以高压补燃液氧煤油火箭发动机起动过程为背景,研究有气体吹入的燃气发生器头腔充填过程。首先通过实验,确定马尔基涅利经验关系式所需系数$ n $为2.29,验证了经验关系式的准确性;其次利用有限元分割建立有气体吹入的燃气发生器头腔的一维分布参数模型,并将实验数据与经验关系式、一维分布模型仿真结果进行对比分析,证明了该模型的准确性。结果表明:一维分布参数模型稳态压强与实验数据平均值误差为0.429%,经验关系式(集中参数模型)误差为1.464%;喷嘴喷注面积增加,头腔内建压速度减慢,且稳定压强值降低;头腔体积增加,建压速度减慢,但压强稳定值不变;头腔摩擦因数增加,压强稳定值与充填速度降低。

     

  • 图 1  实验系统

    Figure 1.  Experimental system

    图 2  实验头腔结构图

    1 螺栓;2 螺母;3 平垫圈;4 喷注面板;5 密封圈; 6 顶盖;7、8 接头;9 喷嘴盖;10 喷嘴;11 密封圈。

    Figure 2.  Structure diagram of experimental head cavity

    图 3  压强计算值与实验值对比

    Figure 3.  Comparison of calculated and experimental pressure

    图 4  单元划分示意图

    Figure 4.  Schematic diagram of unit division

    图 5  集中参数模型仿真结果与实验数据对比

    Figure 5.  Comparison of simulation results and experimental data of centralized parameter model

    图 6  一维分布参数模型仿真结果与实验数据对比

    Figure 6.  Comparison of simulation results and experimental data of one-dimensional distributed parameter model

    图 7  两种模型间压强的对比

    Figure 7.  Comparison of pressure between two models

    图 8  各分段压强变化

    Figure 8.  Pressure change in each segment

    图 9  头腔各单元内喷嘴流出流量

    Figure 9.  Flow rate of nozzle in each unit of head cavity

    图 10  头腔结构参数的影响

    Figure 10.  Influence of structural parameters of head cavity

    图 11  摩擦因数对压强的影响

    Figure 11.  Effect of drag coefficient on pressure

    表  1  各工况下系数n

    Table  1.   Coefficient n under different working conditions

    实验
    序号
    仅有气体
    压降$ /\mathrm{M}\mathrm{P}\mathrm{a} $
    仅有液体
    压降$ /\mathrm{M}\mathrm{P}\mathrm{a} $
    两相时
    压降$ /\mathrm{M}\mathrm{P}\mathrm{a} $
    系数$ n $
    9 0.1103 0.0535 0.3891 2.29974
    10 0.1908 0.0535 0.5351 2.27864
    11 0.2876 0.0535 0.707 2.29336
    12 0.3552 0.0535 0.8204 2.29981
    13 0.1103 0.0663 0.4493 2.37378
    14 0.1908 0.0663 0.5891 2.30218
    15 0.2876 0.0663 0.7573 2.28856
    16 0.3552 0.0663 0.8627 2.27232
    下载: 导出CSV
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  • 收稿日期:  2022-10-08
  • 网络出版日期:  2024-03-27

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