基于耦合欧拉-拉格朗日方法的射弹高速入水尾拍数值分析  

Numerical Analysis of Tail-slapping of Projectile in Process of High-speed Water-entry Based on Coupled Eulerian-Lagrangian Method

作　　者：王晓辉 孙士明[1] 季锦梁 王志[1] 褚学森[1] WANG Xiaohui;SUN Shiming;JI Jinliang;WANG Zhi;CHU Xuesen(China Ship Scientific Research Center,Wuxi 214082,Jiangsu,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《兵工学报》2020年第S01期110-115,共6页Acta Armamentarii

基　　金：国防科技重点实验室基金项目(6142203180306)。

摘　　要：针对超空泡射弹火炮武器在航空反水雷作战中的应用,基于有限元分析软件Abaqus耦合欧拉-拉格朗日方法,开展射弹高速入水过程的数值模拟研究。通过对射弹垂直入水过程的数值模拟,获得高速入水载荷的一般形式;分析射弹倾斜入水过程中入水空泡的包覆状态与入水载荷、入水姿态变化之间的耦合关系,揭示射弹入水尾拍这一动态稳定运动的形成机理。不同入水攻角下射弹高速入水尾拍的仿真结果表明,在相同发射状态下,入水攻角是影响射弹密集度的重要因素。For the use of supercavitation projectile artillery weapon in anti-mine operations,the numerical simulation of high speed water-entry process of projectile is studied based on coupled Eulerian-Lagrangian method.The general form of its load was obtained by studying the vertical water-entry process of projectile.The formation mechanism of tail-slapping is revealed through the analysis of the coupling relationship among covering state of cavity,water entry impact load,and change of projectile attitude in oblique water-entry process of projectile.The numerical study of the high-speed water-entry of projectile at different angles of attack shows that the angle of attack is an important factor affecting the projectile's dispersion.

关 键 词：超空泡射弹 高速入水 耦合欧拉-拉格朗日方法 尾拍 

分 类 号：O351.2[理学—流体力学]