针栓烧蚀对变推力固体发动机压强响应的影响

  • 李春杰 ,
  • 李军伟 ,
  • 田忠亮 ,
  • 王立民 ,
  • 杨航 ,
  • 姚皞宇
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  • 1. 北京理工大学
    2. 北京理工大学宇航学院
    3. 北京航天发射技术研究所
    4. 国防科技大学;中国航天科工第六研究院41所
    5. 南京晨光集团有限责任公司

收稿日期: 2024-11-12

  修回日期: 2024-12-31

  网络出版日期: 2025-01-07

Influence of pintle ablation on pressure response of variable thrust solid motor

  • LI Chun-Jie ,
  • LI Jun-Wei ,
  • TIAN Zhong-Liang ,
  • WANG Li-Min ,
  • YANG Hang ,
  • YAO Hao-Yu
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Received date: 2024-11-12

  Revised date: 2024-12-31

  Online published: 2025-01-07

摘要

为研究针栓烧蚀下变推力固体发动机工作过程中的压强动态响应特性,本文设计了一种后置针栓式变推力固体火箭发动机,并开展了发动机热试车实验,结果显示针栓靠近喉部位置烧蚀严重,最大平均径向烧蚀率为1.31mm/s。建立了考虑针栓烧蚀的内弹道模型,计算结果与实验数据吻合较好,相较不考虑针栓烧蚀的模型最大偏差由12.9%降至3%以下。针栓烧蚀导致发动机调节能力大幅降低,压强调节范围降幅达43.4%。研究了烧蚀开始时刻和烧蚀率对动态压强变化的影响规律,结果表明针栓烧蚀开始时刻的延后会导致升压段压强变化率和升压段压力峰先增大后保持不变,降压段压强变化率和平台段压力波动先增后减,最大值分别为15.27MPa/s和9.03%。随烧蚀率增加,升降压段压强变化率和压力峰减小,降压段压强变化率逐渐降低直至为0,平台段压力波动先增后减最大值为25%,压力偏差则单调增大并趋于定值。

本文引用格式

李春杰 , 李军伟 , 田忠亮 , 王立民 , 杨航 , 姚皞宇 . 针栓烧蚀对变推力固体发动机压强响应的影响[J]. 航空学报, 0 : 1 -0 . DOI: 10.7527/S1000-6893.2024.31519

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