摘要
超声速下子母弹的分离过程是一种包括多体运动边界与复杂气动流场干扰的多体分离问题。采用嵌套网格技术,对流体力学方程组及六自由度刚体动力学方程组进行了耦合求解,重点研究了子母弹的结构特征(包括子弹的数目、有无弹翼及排列方式等)对分离过程中流场特性的影响。结果表明:嵌套网格技术能较好地模拟超声速子母弹分离过程中的复杂扰动流场;子弹体数目越多,弹体间的气动耦合效应越强;尾翼的存在能够极大提高弹体的静稳定性;相较于"圆周型"分布,"中心圆周型"分布趋于加快弹体间的分离。
The separation process of submunitions under supersonic velocity is a typical multi-body separation problem including multi-body motion boundary and complex aerodynamic flow field interference.Based on the nested grid technique,the equations of convection physics and the equations of 6 degrees of freedom of rigid body dynamics are coupled,influence of the structure characteristics(such as number,missile wings,arrangement,etc.)of the submunition on the flow field characteristics in the separation process is emphatically studied.Results show that the method of overset grids can well simulate the complex aerodynamics flow condition of multiple missiles.Under certain circumstances,more bullets will bring stronger aerodynamic coupling effect in;Missile wings can greatly improve the static stability of bullets;Compared with"circular"distribution,"central circular"distribution tends to accelerate the separation of projectile bodies.
作者
黄阳阳
姜毅
李玉龙
张曼曼
杨昌志
HUANG Yang-yang;JIANG Yi;LI Yu-long;ZHANG Man-man;YANG Chang-zhi(Beijing Institute of Technology,School of Astronautics,Beijing 100081,China;PLA,No.96901 Troop,Beijing100094,China)
出处
《现代防御技术》
北大核心
2021年第2期35-42,56,共9页
Modern Defence Technology
关键词
子母弹
多体分离
嵌套网格
计算流体力学
数值模拟
气动耦合
submunition
multi-bodies separation
overset grids
computational fluid dynamics
simulation
aerodynamic coupling
