Numerical Investigation of the Multiphase Flow Originating from the Muzzle of Submerged Parallel Guns  

作　　者：Dongxiao Zhang Lin Lu Xiaobin Qi Xuepu Yan Cisong Gao Yanxiao Hu 

机构地区：[1]School of Mechatronics Engineering,North University of China,Taiyuan,030051,China [2]School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an,710072,China [3]Northwest Institute of Mechanical Electrical Engineering,Xianyang,712099,China

出　　处：《Fluid Dynamics & Materials Processing》2023年第10期2707-2728,共22页流体力学与材料加工（英文）

基　　金：This work is supported by the National Natural Science Foundation of China(Grant No.52201385);the Natural Science Foundation of Shanxi Province(Grant No.20210302123023);the Shanxi Scholarship Council of China(Grant No.2020-106).

摘　　要：A two-dimensional model,employing a dynamic mesh technology,is used to simulate numerically the transient multiphaseflowfield produced by two submerged parallel guns.After a grid refinement study ensuring grid inde-pendence,five different conditions are considered to assess the evolution of cavitation occurring in proximity to the gun muzzle.The simulation results show thatflow interference is enabled when the distance between the par-allel barrels is relatively small;accordingly,the generation and evolution of the vapor cavity becomes more com-plex.By means of the Q criterion for vorticity detection,it is shown that cavitation causes the generation of vorticity and the evolution of the vapor cavity can result in an asymmetric distribution of vorticity for a certain distance of the barrels.In particular,the evolution of the vapor cavity can hinder the expansion of the gas and force it toflow outward,while an asymmetric distribution of vorticity can lead to a gas jetflowing outward and rotating simultaneously.

关 键 词：Submerged parallel launch cavity evolution numerical simulation muzzle flow fields 

分 类 号：O35[理学—流体力学]