超空泡射弹六自由度尾拍运动数值模拟研究  

Numerical simulation research on six-degree-of-freedom tail-slap of supercavitating projectile

作　　者：祝许皓 李杰[1,2] Xu-hao Zhu;Jie Li(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;MOE Key Laboratory of Hydrodynamics,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院工程力学系,上海200240 [2]水动力学教育部重点实验室,上海200240

出　　处：《水动力学研究与进展（A辑）》2022年第4期474-482,共9页Chinese Journal of Hydrodynamics

摘　　要：为了掌握超空泡射弹六自由度运动特性,为超空泡射弹的设计提供理论依据和数据支撑,该文基于有限体积法和VOF多相流模型,结合动网格技术并联合刚体六自由度运动方程,构建了超空泡射弹流场与弹道耦合的数值求解方法,数值研究了不同初始偏航角以及不同初始滚转角速度下,俯仰运动对射弹尾拍运动的影响。结果表明:由于三维转动,超空泡射弹尾拍出现了类似斜碰撞的现象,射弹尾部相对轨迹不再局限于某一平面,而是表现出散布性;由于斜碰撞造成的升力和侧向力的差异,射弹的侧向偏移量表现出明显不同,初始偏航角大的,侧向位移更大。In order to master the six-degree-of-freedom motion characteristics of supercavitating projectiles,and provide theoretical basis and data support for the design of supercavitating projectiles,based on the finite volume method and VOF multiphase flow model,combined with dynamic mesh technology and the six degrees of freedom motion equations of rigid body,a numerical solution method for coupling the flow field and trajectory of the supercavitating projectile is constructed,and the effect of pitching motion on the tail slapping motion of the projectile at different initial yaw angles and different initial roll angular velocities is numerically studied.The results show that due to the three-dimensional rotation,the tail slapping of the supercavitating projectile appears similar to the phenomenon of oblique collision.The relative trajectory of the projectile’s tail is no longer limited to a certain plane,but shows dispersion.Then because of the differences of the lift force and lateral force caused by the oblique collision,the projectile’s lateral offset is significantly different,the larger the initial yaw angle,the greater the lateral displacement.

关 键 词：超空泡射弹 尾拍运动 六自由度运动 

分 类 号：O359.1[理学—流体力学]