Influence on Flow Field of Hot Launch in a W-Shaped Underground Space by Water Injection

Manman ZHANG; Yi JIANG; Shaoyan SHI; Yueguang DENG

doi:10.12382/bgxb.2022.0014

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Influence on Flow Field of Hot Launch in a W-Shaped Underground Space by Water Injection

更新时间：2025-08-18

- Influence on Flow Field of Hot Launch in a W-Shaped Underground Space by Water Injection
- Acta Armamentarii Vol. 44, Issue 4, Pages: 1158-1170(2023)
- 作者机构：
  
  1. 北京理工大学宇航学院, 北京 100081
  2. 北京特种机械研究所, 北京 100143
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2022.0014
  CLC：
- Received：05 January 2022，
  
  Published Online：25 July 2023，
  
  Published：28 April 2023
- 稿件说明：
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Manman ZHANG, Yi JIANG, Shaoyan SHI, et al. Influence on Flow Field of Hot Launch in a W-Shaped Underground Space by Water Injection[J]. Acta Armamentarii, 2023, 44(4): 1158-1170.
DOI：

Manman ZHANG, Yi JIANG, Shaoyan SHI, et al. Influence on Flow Field of Hot Launch in a W-Shaped Underground Space by Water Injection[J]. Acta Armamentarii, 2023, 44(4): 1158-1170. DOI： 10.12382/bgxb.2022.0014.

摘要

采用喷水系统改善导弹地下空间热发射过程的流场

以达到削减压力脉冲峰值、缓解压强振荡和降低流场温度的目的

即减压、降温。结合三维黏性可压缩Navier-Stokes方程、Mixture多相流模型和相变模型

建立气-液两相流控制方程组

并用燃气射流缩比试验数据验证数学模型和数值方法的有效性

采用计算流体力学数值计算方法分析喷水系统对导弹地下空间发射过程流场环境的影响。研究结果表明:在W形地下空间底

部建立喷水系统

可以很好地改善导弹地下热发射过程空间内流场环境特性;喷水系统对初始超压现象有很好地抑制效果

弹底压强振荡由8次减少到4次

压强没有产生剧烈振荡

在1atm上下缓慢变化

最大压强仅为1.20×10

Pa左右

大大削减了初始超压峰值

并降低了压强振荡的频率和幅值

实现了减压效果;通过液态水剧烈汽化、动量交换等过程

喷水系统强烈而有效地抑制了燃气反溅现象

燃气被约束在筒底位置

导弹底部的最高温度从3000K降低到了400K左右

实现了降温效果。

Abstract

The water spray system is used to improve the flow field in the thermal launch process of missiles in underground spaces

with the aim of reducing the peak value of pressure pulse

alleviating pressure oscillation

and reducing the temperature of flow field through “decompression and cooling”. In this study

a gas-liquid two-phase flow control equation is established by combining the three-dimensional viscous compressible Navier-Stokes equation

mixture multiphase flow model

and phase change model. The mathematical model and numerical method are validated using gas jet scaling test data. Computational fluid dynamics (CFD) numerical calculation method is used to analyze the influence of the water spray system on the flow field environment during the missile’s underground space launch process. The results show that the environmental characteristics of the flow field in the underground space during the thermal launch of the missile are effectively improved by establishing a water spray system at the bottom of the W-shaped underground space. The water spray system has a good suppression effect on the initial overpressure phenomenon. The bottom pressure oscillation is reduced from 8 times to 4 times. The pressure changes slowly up and down at 1 atm

with the maximum pressure only about 1.20×10

Pa. The initial overpressure peak is reduced

and the frequency and amplitude of the pressure oscillation are reduced

achieving the decompression effect. Through the process of violent vaporization of liquid water and momentum exchange

the phenomenon of gas backsplash is strongly and effectively suppressed by the water spray system. The gas is confined at the bottom of the cylinder

and the m

aximum temperature at the bottom of the missile is reduced from 3000K to about 400K

achieving the “cooling” effect.

关键词

Keywords

references

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