射弹高速入水尾拍载荷和弹道特性的数值研究  

Numerical study on hydrodynamic and ballistic characteristics of projectile’s high-speed water-entry process

作　　者：王晓辉 李鹏[1] 孙士明[1] 张珂[1] WANG Xiao-hui;LI Peng;SUN Shi-ming;ZHANG Ke(National Key Laboratory of Science and Technology on Hydrodynamics,China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心水动力学国家重点实验室,江苏无锡214082

出　　处：《船舶力学》2022年第8期1111-1119,共9页Journal of Ship Mechanics

基　　金：水动力学实验室基金项目(6142203180306)。

摘　　要：针对超空泡射弹火炮武器在水下近程防御中的应用,本文基于耦合欧拉—拉格朗日(CEL)方法重点对射弹伴随尾拍的高速入水过程进行数值模拟研究。数值模拟捕捉到了射弹尾拍影响下入水超空泡形态的不连续演化特征,并获得了射弹尾拍对其水动力载荷、弹道运动的影响。研究表明,射弹尾拍会伴随其轴向、侧向载荷的增加,其水动力载荷表现出非对称特征。在射弹进入稳定的尾拍航行状态后,对射弹单个尾拍周期内航行阻力取均值,通过引入尾拍阻力增加系数的方式,将其尾拍航行状态向理想的超空泡航行状态等效,获得了射弹水下超空泡尾拍航行过程的弹道性能。进一步对射弹水下射程的评估表明,采用超空泡射弹武器进行水下近程防御是可行的。Aiming at the application of supercavitation projectile artillery weapon in shipboard close-in de⁃fense,numerical simulation of projectile’s tail-slap in high-speed water-entry process based on CEL(cou⁃pled Eulerian-Lagrangian analysis)method was presented in this paper.The discontinuity of cavity due to projectile’s tail-slap was obtained,the change of load and motion parameters caused by tail-slap were stud⁃ied,too.The results show that the projectile’s tail-slap is accompanied by the increase of axial and lateral loads,and that the change of loads is characterized by non-symmetry.During the relative stable motion stage,by taking the average value of the drag caused by projectile’s tail-slap in one cycle,a coefficient represent⁃ing the tail-slap’s effect was obtained,and the underwater ballistic performance of projectile with tail-slaps was analyzed.The results show that the supercavitating projectile artillery weapon is feasible in underwater close-in defense.

关 键 词：射弹 入水空泡 尾拍 水中弹道 

分 类 号：O352[理学—流体力学]