摘要
为分析膛口冲击波的物理特性,分别对点爆炸和膛口初始流场进行了数值模拟.采用Roe/HLL混合计算方法,消除了二阶Roe格式引起的激波不稳定现象,初始流场数值结果与实验照片吻合较好.获取了点爆炸冲击波和初始冲击波的波阵面及其超压峰值等值线,在此基础上分析了二者在时间上的分布特征及衰减规律.结果表明,膛口冲击波是球心作减速运动的变能量球形冲击波.
The point explosion and muzzle precursor flow were simulated numerically in order to analyze the physical characteristics of muzzle blast wave.Using Roe/HLL method,the shock instability caused by second-order Roe format was eliminated.The numerical result of precursor flow field coincides well with the experimental shadowgraph.The wave front and overpressure peak contour-lines of point explosion blast wave and precursor blast wave were obtained.On this basis,the distribution and attenuation characteristics ...
出处
《弹道学报》
EI
CSCD
北大核心
2010年第1期57-60,共4页
Journal of Ballistics
基金
国防科技重点实验室基金项目
教育部新教师博士点基金项目(20070288069)
关键词
膛口冲击波
超压峰值
混合格式
数值模拟
muzzle blast wave
peak overpressure
mixed scheme
numerical simulation
