摘要针对制导弹药发射过程中火药燃气的热作用对武器性能产生的不利影响，本论文从保证发射安全性出发，以某口径火炮为研究对象，对发射过程中火药燃气热传递和身管内部的温度分布进行分析研究。主要包括:运用内弹道两相流理论，对膛内发射过程中的气流速度、温度、密度和压力等参量进行了数值模拟;推导了临近膛壁的边界层方程和一维身管热传导方程，利用边界层简化模型进行计算分析，得到适合发射过程计算边界层传热的关系式:综合核心流、边界层传热和身管热传导三方面，运用有限差分法对单发和连续发射过程身管进行热分析研究;并分析了影响身管温度的装药系数、装药量和射频等几种因素。本研究对武器发射过程中的安全性能将有很大的帮助。63562

毕业论文关键词  内弹道  数值模拟 热分析

毕业设计说明书（论文）外文摘要

Title    Thermal Effect Analysis and Coupling  of Launching Process of Guided Projectile                       

Abstract

The heat transfer phenomena has many disadvantageous effects on the performances of gun.In this dissertation，heat transfer has been studied based on the gun in order to assess the heat effect on launching safety. The main work includes：The parameters such as gas velocity，temperature，density and  pressure have been numerically simulated on the Two-phase flow theory.The boundary layer equation and the one-dimensional heat conduction equation of barrel are deduced.The simplified model of the boundary layer is calculated and analyzed and obtain the heat transfer correlations,integrated core flow,heat transfer of the boundary layer and of the barrel, and the finite difference method is used to analyze heat in the process of the barrel with the single and serial shots, as well as several factors that effect heat of the barrel，such as the fire rate，environment temperature，the mass of charge and shooting frequency. Generally this study helps improve safety during launching.  

keywords   interior ballistics  numerical simulation  heat analysis

主要符号表

B 装填参量

e 药粒已燃厚度

e1 1/2火药起始厚度，也称弧厚

f 火药力

l0 药室容积缩径长

lψ 药室自由容积缩径长

lg 弹丸全行程长

l 弹丸行程长

m 弹丸质量

n 燃速指数

p 平均压力

p0 挤进压力

pm 炮口压力

S 炮膛断面积

Ik 火药燃烧结束瞬间压力全冲量

k 绝热指数

v 弹丸速度

vj 弹丸极限速度

V0 药室容积

Z 火药已燃相对厚度

Zk 多孔火药分裂后碎粒全部燃完时的燃去相对厚度

α 火药气体余容

Δ 装填密度

u1 燃速系数