Numerical Study on the Vertical Water Exit of A Cylinder with Cavity

作     者：ZHANG Xing-yu LYU Xu-jian FAN Xu-dong ZHANG Xing-yu;LYU Xu-jian;FAN Xu-dong

作者机构：School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China 

出 版 物：《China Ocean Engineering》 (中国海洋工程（英文版）)

年 卷 期：2022年第36卷第5期

页      面：734-742页

核心收录：

学科分类：082601[工学-武器系统与运用工程] 08[工学] 082501[工学-飞行器设计] 0826[工学-兵器科学与技术] 082602[工学-兵器发射理论与技术] 0825[工学-航空宇航科学与技术] 

基　　金：financially supported by the Science and Technology on Underwater Information and Control Laboratory(Grant No.2021-JCJQ-LB-030-05) 

主　　题：water exit cavity CFD 

摘      要：When a high-speed body with cavity passes through water-air free surface and exits water,its mechanical environment and dynamic characteristics change significantly due to the great difference in density and viscosity between water and *** focusing on this problem,the Computational Fluid Dynamics(CFD)method is applied to perform numerical calculation on the process of this vapor-liquid-gas flow during the water exit of a high-speed cylinder,with the Volume of Fraction(VOF)multiphase flow interface-capturing techniques and the overset grid *** the verification and validation of the CFD model through mesh convergence study and a water-entry experiment,cavity evolution and flow characteristics including pressure and velocity distribution during the water exit are *** effects of different initial velocities on the pressure distribution and drag characteristics of the cylinder are *** results show that the cavity collapse during water exit causes strong pressure fluctuation on the cylinder;when the cylinder exits water enveloped in a supercavity,the pressure distribution on its wall surface and surrounding water region is relatively uniform,and the drag changes gently,and thus the cylinder has good motion stability.