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弹箭与制导学报 >

2023 , Vol. 43 >Issue 2: 109 - 118

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.02.018

壳药间隙对自由装填固体发动机初始建压过程的影响研究

  • 颜密 1, 3 ,
  • 马宇 2 ,
  • 田小涛 1, 3 ,
  • 贾胜锡 1, 3 ,
  • 张皓 1, 3
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  • 1 西安现代控制技术研究所,陕西 西安 710065
  • 2 西安近代化学研究所,陕西 西安 710065
  • 3 现代控制技术实验室,陕西 西安 710065
田小涛(1975—),男,研究员级工程师,硕士,研究方向:固体火箭发动机技术。

颜密(1988—),女,高级工程师,博士,研究方向:固体火箭发动机技术。

收稿日期: 2022-10-29

  网络出版日期: 2025-02-24

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Study on Influence of Shell-charge Gap on Ignition Pressure-building Process of Free-loading Solid Rocket Motor

  • YAN Mi 1, 3 ,
  • MA Yu 2 ,
  • TIAN Xiaotao 1, 3 ,
  • JIA Shengxi 1, 3 ,
  • ZHANG Hao 1, 3
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  • 1 Xi’an Modern Control Technology Research Institute, Xi’an 710065, Shaanxi, China
  • 2 Xi’an Modern Chemistry Research Institute, Xi’an 710065, Shaanxi, China
  • 3 Laboratory of Modern Control Technology, Xi’an 710065, Shaanxi, China

Received date: 2022-10-29

  Online published: 2025-02-24

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摘要

针对典型的包覆药柱自由装填固体发动机,基于内流场数值仿真,分析不同壳药间隙下的发动机初始建压过程,获得壳药间隙对发动机初始建压过程的压强分布及变化的影响规律。首先分析了发动机建压过程中不同时刻的内流场分布特性。其次分析了一定壳药间隙下的发动机初始建压过程,通过对仅点火药工作和点火药、装药共同工作工况下的燃烧室压强分布随时间的变化情况分析,获得了间隙不同位置与装药盲孔腔的压强差值随时间的变化情况。最后分析了不同壳药间隙对发动机初始建压过程的影响,通过3种壳药间隙下的燃烧室建压过程计算结果分析,获得壳药间隙对燃烧室压强平衡时间、点火最大压强差和二次最大压强差的影响规律。研究结果表明,在发动机初始建压过程中,燃烧室的总压强平衡时间、点火最大压强差和二次最大压强差均随着壳药间隙的减小而增大。

关键词： 自由装填; 固体发动机; 壳药间隙; 建压过程; 数值仿真

本文引用格式

颜密 , 马宇 , 田小涛 , 贾胜锡 , 张皓 . 壳药间隙对自由装填固体发动机初始建压过程的影响研究[J]. 弹箭与制导学报, 2023 , 43(2) : 109 -118 . DOI: 10.15892/j.cnki.djzdxb.2023.02.018

Abstract

Based on the numerical simulation of internal flow field, the initial pressure build-up process of a typical free filled solid motor with coated grain is analyzed under different shell grain gap, and the influence law of shell grain gap on the pressure distribution and change of the initial pressure build-up process of the motor is obtained. Firstly, the distribution characteristics of internal flow field at different times in the process of engine pressure building are analyzed. Secondly, the initial pressure build-up process of the engine under a certain shell charge gap is analyzed. Through the analysis of the change of the pressure distribution of the combustion chamber with time under the working conditions of only ignition and ignition charge, the change of the pressure difference between different positions of the gap and the charge blind hole cavity with time is obtained. Finally, the effects of different shell propellant gaps on the initial pressure build-up process of the engine are analyzed. Through the analysis of the calculation results of the pressure build-up process of the combustion chamber under three shell propellant gaps, the effects of shell propellant gaps on the pressure balance time of the combustion chamber, the maximum ignition pressure difference and the secondary maximum pressure difference are obtained. The results show that during the initial pressure build-up of the engine, the total pressure balance time, the maximum ignition pressure difference and the secondary maximum pressure difference of the combustion chamber increase with the decrease of the assembly clearance.

Key words： free-loading; solid rocket motor; shell-charge gap; pressure-building process; numerical simulation

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