## 复合推进剂两相流点火数值模拟

Title  Numerical simulation of two-phase flow in composite propellants
Abstract The inconsistent ignition of base bleed igniter for base bleed grain is one of the important factorn resulting in rang dispersion.  For the sake of investigation the inconsistent causes of ignition and reveal the ignition mechanisn of base bleed ignite, the reignition process and characteristics of base bleed grain ignited by igniter after a 155mm base bleed projectile flied out of the gun muzzle was analyzed.  A two-phase flow strengthened ignition model was established based on gas-particle two-phase jet theory.  In the model, the coupling process of pure gas and two-phase jet , and a complex heat transfermechanisrm,，including heat radiation,heat convection and heat conduction,of solid-gas or liquid-gas two-phase flow in solid base bleed grain were considered.To obtain the ignition softening time and ignition delay time of base bleed grain,the reignition process was numerically simulated.The numerically simulated results were basically in agreement with the experimental results. The model is suitable for solid propellant which has the similar ignition process.

Keywords  fluid mechanics;  two-phase flow; ignition model; base bleed grain;numerical simulation

1  绪论    1
1.1 课题研究背景及意义    1
1.2 国内外研究现状    1
1.3 本文的主要研究内容    5
2  底排药剂固相点火理论模型    5
2.1引言    5
2.2 底排药柱燃烧特性研究    6
2.3 本章小结    8
3  底排药剂固相点火理论模型    8
3.1 传热基础模型    8
3.2 底排药剂点火模型    11
3.3 固相点火理论    12
3.4 燃气加热固相点火模型    12
3.5 两相流点火模型    13
4．编程及演示    21
4.1 VB程序介绍    21
4.2 语言特点    21

1  绪论
1.1 课题研究背景及意义

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