摘要
利用拉格朗日方法跟踪弹后工质的运动规律，采用ＶｏｎＮｅｕｍａｎｎＲｉｃｈｔｍｙｅｒ差分格式对带有坡膛、有限药室长的一级轻气炮进行了内弹道一维数值模拟，对不同的工质，在初温及相对装药量变化的情况下进行了计算．计算结果表明：（１）对同一种工质，初始装填压力ｐ０和ω／Ｍ相同时，初温对弹丸的相对初速ｖｇ／ｃ０和炮口压力ｐｇ几乎没有影响；（２）对同一种工质，在ｐ０相同时，ｖｇ／ｃ０可表示成ω／Ｍ的函数，并随ω／Ｍ的增大而增大；（３）同一初温下，在ｐ０和弹丸质量ｍ相同时，分子量小的气体可使压力降ｐｇ／ｐ０越小，从而使弹丸获得较大的初速ｖｇ．
By tracing the gas moving regularity after the projectile with Largrange approach and adopting Von Neumann Richtmyer Scheme, this paper simulates numerically the 1 D interior ballistic process of one stage light gas gun with shoulder of chamber and finite length chamber under the change of initial temperature and relative charge mass. The results show:①for the same gas, if the loading pressure p 0 and ω/M are the same, the initial temperature has few effect on the relative initial velocity v g/c 0 of the projectile and muzzle pressure p g . ②for the same gas, on the condition of the same p 0,v g/c 0 is expressed as the function of ω/M , and rise with ω/M . ③under the same initial temperature, p 0 and projectile mass m , the gas with little molecule weight make the p g/p 0 lees, so as to make the projectile to gain the higher muzzle velocity v g .
出处
《弹道学报》
CSCD
北大核心
1998年第4期21-25,共5页
Journal of Ballistics
关键词
轻气炮
内弹道
数值模拟
数学物理模型
light gas gun, interior ballistics, numerical simulation
