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弹箭与制导学报 >

2024 , Vol. 44 >Issue 2: 30 - 35

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2024.02.005

固体火箭发动机燃气射流与超声速来流相互作用数值研究

  • 张恩豪 ,
  • 樊建龙 ,
  • 朱亮 ,
  • 邓恒
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  • 西安现代控制技术研究所,陕西 西安 710065

张恩豪(1993—),男,助理工程师,硕士,研究方向:固体火箭发动机燃气射流。

收稿日期: 2022-07-17

  网络出版日期: 2024-12-28

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Numerical Study on Interaction Between Gas Jet and Supersonic Flow in Solid Rocket Motor

  • ZHANG Enhao ,
  • FAN Jianlong ,
  • ZHU Liang ,
  • DENG Heng
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  • Xi’an Mordern Control Technology Research Institute,Xi’an 710065,Shaanxi, China

Received date: 2022-07-17

  Online published: 2024-12-28

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摘要

针对固体火箭发动声速来流机续航级在超声速来流中的燃气射流及外流场特点,利用数值模拟方法,分别对不同工况下固体火箭发动机尾焰及外流场进行流场结构定性分析,得到该流场结构大体可分为外场区、回流区及尾流区;通过对比不同高度轴线上参数,得到随着工作高度增加,喷管流动分离现象消失,波节减少,首个入射激波形成距离喷管出口距离增加,激波波面速度增大;通过对比回流区壁面参数,得到随着工作高度的增大,回流区壁面温度及马赫数增大,低压回流区导致喷管的实际工作压力低于环境压力30%以上;当喷管处于欠膨胀工作状态时,回流区流体马赫数呈现先减小后增大趋势,且靠近尾焰端受工作高度影响显著。

关键词： 固体火箭发动机; 燃气射流; 数值模拟; 超声速; 混合工质

本文引用格式

张恩豪 , 樊建龙 , 朱亮 , 邓恒 . 固体火箭发动机燃气射流与超声速来流相互作用数值研究[J]. 弹箭与制导学报, 2024 , 44(2) : 30 -35 . DOI: 10.15892/j.cnki.djzdxb.2024.02.005

Abstract

In order to obtain the interaction characteristics of supersonic flow and solid rocket motor (SRM) range stage gas jet, based on computational fluid dynamics (CFD), a high-precision numerical calculation scheme is used to simulate the interaction flow field of SRM gas jet and supersonic flow under different working conditions. The whole flow field can be roughly divided into the outer field, the recirculation zone and the plume zone. Under a certain nozzle drop pressure ratio, with the increase of altitude, the nozzle flow separation phenomenon gradually disappears, the jet wave nodes decrease, and the distance between the formation of the first incident shock wave and the nozzle outlet increases. On the other hand, the increase of altitude will cause the increase of the recirculation zone wall temperature rise. In addition, the actual working pressure is more than 30% lower than the static pressure due to the rapid expansion of supersonic inflow at the rear edge of the projectile.

Key words： solid rocket motor; gas jet; numerical simulation; supersonic speed; mixed refrigerants

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