Supercavitating Projectile Tail-Slaps Based on a Normal Distribution  

基于正态分布的超空泡射弹的尾拍运动研究

作　　者：Kangjian Wang Youran Xia Qizhuang Kang Youli Wu 王康健;夏悠然;康其庄;伍友利

机构地区：[1]Aviation Engineering College,Air Force Engineering University,Xi’an 710038,China [2]National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《哈尔滨工程大学学报(英文版)》2025年第2期398-414,共17页Journal of Marine Science and Application

基　　金：Supported by the National Natural Science Foundation of China(Grant No.62101590).

摘　　要：The present study focuses on simulating supercavitating projectile tail-slaps with an analytical method.A model of 3σ-normal distribution tail-slaps for a supercavitating projectile is established.Meanwhile,theσ-κequation is derived,which is included in this model.Next,the supercavitating projectile tail-slaps are simulated by combining the proposed model and the Logvinovich supercavity section expansion equation.The results show that the number of tail-slaps depends on where the initial several tail-slaps are under the same initial condition.If the distances between the initial several tail-slap positions are large,the number of tail-slaps will considerably decrease,and vice versa.Furthermore,a series of simulations is employed to analyze the influence of the initial angular velocity and the centroid.Analysis of variance is used to evaluate simulation results.The evaluation results suggest that the projectile’s initial angular velocity and centroid have a major impact on the tail-slap number.The larger the value of initial angular velocity,the higher the probability of an increase in tail-slap number.Additionally,the closer the centroid is to the projectile head,the less likely a tail-slap number increase.This study offers important insights into supercavitating projectile tail-slap research.

关 键 词：Tail-slaps Normal distribution Supercavity STABILITY Supercavitating projectile 

分 类 号：TJ012.1[兵器科学与技术—兵器发射理论与技术]