初速对高速射弹尾拍特性影响研究  

Study on the Influence of Initial Velocity on the Characteristics of High Speed Projectile Tail-slapping

作　　者：梁景奇 徐保成[1] 王瑞[1] 祁晓斌 李瑞杰 LIANG Jingqi;XU Baocheng;WANG Rui;QI Xiaobin;LI Ruijie(Northwest Institute of Mechanical and Electrical Engineering,Shaanxi Xianyang 712099,China)

机构地区：[1]西北机电工程研究所,陕西咸阳712099

出　　处：《弹箭与制导学报》2020年第2期130-134,139,共6页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：针对超空泡射弹的尾拍运动特性问题,采用CFD软件动网格移动计算域技术,建立了超空泡射弹多自由度运动求解的数值模型,实现了射弹与空泡的双向耦合。在验证了模型准确性的基础上,研究了射弹不同初速下的尾拍运动特性。结果表明,超空泡射弹的水下弹道具有动态稳定性;弹体偏转引起空泡轴线偏移,尾拍沾湿区域具有不对称性;增大初速,尾拍周期减小,尾拍升、阻力及俯仰角速度的振荡幅值增大,俯仰角的振荡幅值受初速影响极小。Aiming at the tail-slapping motion characteristics of supercavitating projectiles.In this paper,using dynamic mesh mobile computing domain technology of CFD software,a multi-degree-of-freedom computational model of supercavitating projectiles is proposed to provide a two-way coupled simulation between the projectile and external fluid.On the basis of verifying the accuracy of the model,the characteristics of projectile tail-slapping motion at different initial velocity are studied.It is found that the underwater ballistics of the supercavitating projectile is dynamically stable.The deflection of the projectile causes the axis of the cavity to deviate.The area of the tail-slapping puncture is asymmetrical.The faster initial velocity,the greater the oscillation amplitude of tail slap lift,tail slap drag and pitch angular velocity,the smaller the period of tail-slapping.The amplitude of pitch angle oscillation is minimally affected by the initial velocity.

关 键 词：超空泡射弹 尾拍 耦合运动 数值仿真 

分 类 号：TJ410[兵器科学与技术—火炮、自动武器与弹药工程] TG67[金属学及工艺—金属切削加工及机床]