潜射导弹出筒过程流场与运动特性分析  

Flow Field and Motion Characteristics Analysis of Ejection Process of Submarine-launched Missile

作　　者：李海龙 张军[1] 黄达[1] 宋志超 丁琪 王玺琛 LI Hailong;ZHANG Jun;HUANG Da;SONG Zhichao;DING Qi;WANG Xichen(College of Aeronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空学院,江苏南京210016

出　　处：《弹道学报》2024年第4期104-110,共7页Journal of Ballistics

摘　　要：潜射导弹是国家威慑力量的重要组成,其出筒过程作为发射的初始关键阶段,存在高压气体对弹底的巨大冲击以及气体和水之间强烈的相互作用等复杂流体动力学问题,具有重要的研究意义。基于压力基下的三维非定常可压缩数值模拟方法,采用VOF多相流模型和重叠网格技术,分别对楔形体入水过程的加速度变化和不同工况下潜射导弹出筒过程中流场变化和弹体运动特性开展了研究。通过对楔形体入水过程的模拟验证了网格的无关性与本文计算方法的有效性。对潜射导弹出筒过程的模拟结果表明:筒底压力越大,出筒速度越快,所受轴向力越大,速度衰减更为迅速,且弹体横向位移越大,所受横向载荷越高;来流导致了迎流面气体减少,背流面气体增多,两侧流场的不对称形成了侧向力和绕质心的旋转力矩,弹体因此向来流方向偏转;来流速度越大弹体横向加速度越大,弹体越容易偏移。本文研究结果可以为潜射导弹出筒过程的弹道设计提供理论及技术支撑。Submarine-launched missile is an important component of a nation's strategic deterrent force.As the initial launch stage,the ejection process of submarine-launched missile involves complex fluid dynamics problems such as the huge impact of high-pressure gas on the bottom of the missile and the strong interaction between gas and water,which is of great significance to research.Based on the three-dimensional unsteady compressible numerical simulation method,VOF multiphase flow model and overlapping grid technology were utilized to study the acceleration during the process of wedge entry and the flow field and motion characteristics under different conditions during the ejection process of submarine launched missiles.The simulation results show that the higher bottom pressure leads to the larger exit velocity,the greater axial force,the faster attenuation of the velocity,the larger the lateral displacement of the projectile,and the greater lateral load.The incoming flow gives rise to a decrement in gas on the upstream side and an increment in gas on the downstream side.The asymmetry of the flow fields on both sides creates lateral forces and rotational moments with respect to the center of mass,causing the projectile to deflect in the direction of the incoming flow.The higher inflow velocity leads to the greater lateral acceleration of the projectile and the larger possibility to deviate.The research results can provide technical support for the ballistic design of submarine launched missiles.

关 键 词：潜射导弹 出筒 可压缩 VOF多相流 重叠网格 模拟仿真 

分 类 号：TJ76[兵器科学与技术—武器系统与运用工程]