子母弹燃气囊静态抛撒气囊破裂射流流场仿真分析  

Simulation Analysis on Jet Flow Field Structure Characteristic of Static Scattering Combustion Gasbag of Submunition

作　　者：宁惠君[1] 黄凯 王金龙[3] 张成[3] 陶如意[3] 王浩[3] 

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023 [2]上海齐耀动力技术有限公司,上海201203 [3]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《兵工学报》2016年第1期1-9,共9页Acta Armamentarii

摘　　要：针对子母弹燃气囊抛撒试验中出现的气囊破裂对子弹运动特性的影响,建立了气囊抛弹的三维动力学模型。基于计算流体力学Fluent软件,通过编译自定义程序将六自由度刚体动力学方程与流体控制方程进行耦合,对气囊破裂自由射流流场结构特性及子母弹抛撒过程中气囊破裂射流流场结构特性进行对比,获得了气囊内压力变化规律。对不同破口位置的气囊射流流场进行仿真分析,获得了不同破口位置气囊内压力变化规律及对子弹的运动特性影响。计算结果表明:与气囊破裂自由流场结构相比,存在子弹时对气囊破裂射流流场结构有很大的影响;在中心位置破裂时对气囊内压力变化影响最大,破口在中心位置及短边侧时对子弹姿态的影响最大。该研究结果对预估子弹飞行弹道,了解气囊破射流流场对子弹运动的作用机理和影响规律,提高子母弹分离时的可靠性和安全性具有参考价值。A three-dimensional dynamic model of the combustion gasbag rupture projector structure is es- tablished to research the rupture of gasbag and its influence on projectile motion during the test of the combustion gasbag. The gasbag rupture jet flow field is simulated by using computational fluid dynamics, and software Fluent the six degrees of freedom equation of rigid body motion is coupled with the fluid gov- erning equation. The variation rule of the internal pressure of gasbag is obtained by comparing the jet flow structure characteristics of free jet and the gasbag rupture jet generated in the dispersal process of submu- nition. The gasbag rupture jet with different ruptured position at gasbag is simulated, the variation of the internal pressure of gasbag and its influence on projectile motion is obtained. The calculated results show that the existence of the projectile had a great effect on the jet space, and the gasbag rupture jet flow structure is very different from the free jet flow structure. When the gasbag is ruptured at the center position, it has the greatest impact on the internal pressure of gasbag; and when the gasbag is ruptured at the center or at the short side, it has the greatest impact on the attitude of projectile.

关 键 词：兵器科学与技术 子母弹燃气囊 气囊破裂 自由射流 流场结构 运动姿态 

分 类 号：TJ012[兵器科学与技术—兵器发射理论与技术]