螺旋桨影响下水下航行体尾流特性分析  

Numerical Investigation on Wake Characteristics of Underwater Vehicle Under Influence of Propeller

作　　者：任岩 郭晓宇[1,2] 王方勇[3] 唐浩 Ren Yan;Guo Xiaoyu;Wang Fangyong;Tang Hao(Engineering Mechanics,Shanghai Jiao Tong University,Shanghai 200240,China;Key Laboratory of Hydrodynamics(Ministry of Education),Shanghai Jiao Tong University,Shanghai 200240,China;Science and Technology on Sonar Laboratory,Hangzhou Applied Acoustics Research Institute,Hangzhou 310023,China)

机构地区：[1]上海交通大学工程力学系,上海200240 [2]上海交通大学水动力学教育部重点实验室,上海200240 [3]杭州应用声学研究所声纳技术重点实验室,杭州310023

出　　处：《水动力学研究与进展（A辑）》2024年第5期706-714,共9页Chinese Journal of Hydrodynamics

摘　　要：该文针对广域、高效的水下目标探测需求,开展水下航行体尾流特性研究。基于商业软件STAR-CCM+,采用虚拟盘方法考虑螺旋桨的旋转效应,建立了全附体水下航行体尾流场数值仿真模型,采用特征量对比与数据回归方法分析尾流特征。研究结果表明:在螺旋桨影响下,轴向速度分布逐渐发展成类似射流截面分布;远场轴向最大速度增量幂次关系与圆管射流接近,而半尾迹宽度与轴对称物体尾流接近;雷诺应力自相似特性演化距离长于速度的演化距离;自相似性形成后,速度剖面与雷诺数无关,但轴向速度自相似性起始位置、轴向最大速度增量和半尾迹宽度受雷诺数影响。To better understand the wake evolution,the characteristics of the wake field of fully attached craft with propeller are numerically studied in this paper.Based on commercial software STAR-CCM+,a numerical model for the wake field of underwater vehicle is established by using virtual disk method,which can simulate the rotation effect of the propeller,and the wake characteristics is analyzed by using feature quantity comparison and data regression methods.Under the influence of propeller,the axial velocity distribution gradually develops into a jet-like cross-section distribution.The power-law relation of the maximum velocity increment in the far field is close to that of the circular tube jet,while the width of the semi-wake is close to that of the axisymmetric body.The occurring of self-similar characteristics for Reynolds stress undergoes a longer distance compared to that of axial velocity.After the formation of self-similarity,the cross-section velocity distribution is independent of the Reynolds number,while the starting position of the axial velocity self-similarity,the axial maximum velocity increment and the semi-wake width are affected by the Reynolds number.

关 键 词：螺旋桨 虚拟盘模型 水下航行体 尾流 自相似性 

分 类 号：TU476[建筑科学—结构工程]