双发回转体水下齐射流体动力特性数值仿真  

Numerical Simulation of Hydrodynamic Characteristics of Double-Revolving Bodies in Underwater Salvo

作　　者：施瑶[1,2] 高山 潘光[1,2] SHI Yao;GAO Shan;PAN Guang(School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China;Key La-boratory of Unmanned Underwater Vehicle Technology of Ministry of Industry and Information Technology,Xi’an 710072,China)

机构地区：[1]西北工业大学航海学院,陕西西安710072 [2]西北工业大学无人水下运载技术重点实验室,陕西西安710072

出　　处：《水下无人系统学报》2021年第5期524-532,共9页Journal of Unmanned Undersea Systems

基　　金：国家自然科学基金(52172324);中央高校基本科研业务费(3102019JC006).

摘　　要：为研究双发回转体水下齐射过程流体动力演化特性,基于均质多相流理论、标准RNG k-ε模型、Singhal空化模型以及重叠网格技术,建立三维双发回转体水下齐射模型,开展不同发射速度下双发回转体非定常空泡与运动姿态演变过程数值仿真,分析了典型工况下双发回转体齐射过程流场结构演变、运动特性以及齐射速度对其运动特性的影响。结果表明:航行前期空泡发展至最大,随着航行器向自由液面运动,空泡从其末端由下至上逐渐脱落,并发生了溃灭现象;由于齐射过程中流动干扰区域的存在,双发回转体肩部空泡形态演变过程由不对称演变为对称状,从而导致回转体质心先向内侧偏移,随后不断向外侧偏移;随着齐射速度的增大,回转体出筒时刻空泡长度不断增大,其质心由内侧向外侧偏移的交点向后推迟,同时偏转角度不断减小。此研究对水下齐射工程技术具有一定的借鉴意义。To study hydrodynamic characteristics in the underwater salvo process of double-revolving bodies,a three-dimensional underwater salvo model is built in this study based on the homogeneous multiphase flow theory,standard RNG k-εmodel,Singhal cavitation model,and overlapping mesh technique.Numerical simulations of the evolution of an unsteady cavity are conducted to determine the movement attitudes of double-revolving bodies at dif-ferent launching velocities.The flow structure evolution,motion characteristics,and salvo velocity during the salvo process under a typical condition are analyzed.The results show that the maximum development of the cavity is ob-served during the early stage of water navigation.As the revolving bodies move towards the free surface,the cavity gradually sheds from its end towards its top.The structure collapses owing to a flow interference region in the salvo process,because the evolution of the cavity in the shoulder of the double-revolving bodies is from asymmetric to sym-metric,causing mass center deflection of the revolving bodies from the inside to the outside.As the salvo velocity in-creases,the length of the cavity increases at the outlet of the tube moment,the intersection point of the deflection of the center of mass from the inside to the outside is delayed backward,and the angle of deflection decreases.

关 键 词：双发回转体 水下齐射 空泡 回射流 水动力特性 

分 类 号：TJ630.1[兵器科学与技术—武器系统与运用工程] O351.2[理学—流体力学]