某迫击炮炮口流场数值模拟与分析  

Numerical Simulation and Analysis of Mortar' s Muzzle Flow Field

作　　者：黄欢[1] 何永[1] 蔺月敬[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《火炮发射与控制学报》2012年第4期63-67,共5页Journal of Gun Launch & Control

摘　　要：为研究迫击炮超压值对人体的影响,模拟了弹丸出炮口后的流场。考虑了炮膛与弹丸定心部间隙的内弹道经典模型,计算内弹道参数。根据内弹道计算结果初始化弹丸在炮口时的膛内流场,然后模拟膛内气体流空形成的炮口流场,过程引入了火药气体与弹丸运动的耦合作用。计算过程采用分块网格的整体运动处理方法和结构化网格动态层变方法。计算结果捕捉到清晰瓶状激波系,详细分析了炮口周围不同监测点的超压值及膛内气体流空过程,对炮口冲击波的研究具有指导意义。In order to study the influence of mortar overpressure on the human body,the muzzle flow field after the projectile exited from the mortar muzzle was simulated.The classical model of interior ballistics,in terms of the gap of the bore and projectile,was established to calculate the interior ballistic parameters.According to the results of the interior ballistic calculation,the gas flow field in bore was initialized with the aid of the projectile in the muzzle,and then the muzzle flow field,formed by the gas flowing out of the bore,was simulated by means of considering fluid-solid coupling of the gunpowder gas and the projectile.The method of whole movement of block grids and dynamic layering method for structured grids would be applied.The clear shockwaves of muzzle flow fields can be captured,and the overpressure value of diffe-rent monitoring points around the muzzle as well as the process of the gas flowing out of the bore were analyzed in detail.This method can provide guidance for the research of muzzle blast wave.

关 键 词：迫击炮 流场 耦合 弹丸 结构化网格 

分 类 号：TJ31[兵器科学与技术—火炮、自动武器与弹药工程]