泵喷式推进器数值模拟及尺度效应分析  

Numerical Simulation of Pump Jet Propulsor and Analysis of Scale Effect

作　　者：阳峻 冯大奎[1,2,3] 张航 余嘉威[1] 周宇杰 YANG Jun;FENG Dakui;ZHANG Hang;YU Jiawei;ZHOU Yujie(School of Naval Architecture&Ocean Engineering,Huazhong University of Science and Technology Wuhan,430074,China;Collaboration Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai,200240,China;Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics,Wuhan 430074,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,武汉430074 [2]高新船舶与深海开发装备协同创新中心,上海200240 [3]船舶和海洋水动力湖北省重点实验室,武汉430074

出　　处：《中国造船》2020年第S02期91-99,共9页Shipbuilding of China

摘　　要：研究了由前置定子、转子和导管组成的泵喷推进器的敞水特性和流动干扰,数值模拟两种不同尺度推进器的流动特性,分析各组成部分的尺度效应.数值方法采用自研的CFD软件HUST-Ship,使用结构化重叠网格对求解域进行离散,用有限差分法对SST k-ω湍流模型进行数值离散.分别监测转子、前置定子、导管上的推力系数和转矩系数,小尺度下的数值计算结果与试验数据吻合良好.为了分析不同尺度下的差异,数值模拟了大尺度模型,并进行了网格独立性和时间步长独立性的验证.对比不同尺度的计算结果,并分析大、小尺度的无因次速度场和压力场,发现推进器各部分均存在尺度效应.This paper presents numerical studies on the open water characteristic of a pump jet propulsor consist of pre-swirl stators, rotors and duct. Simulation was performed on two scales of the pump jet to research the scale effect. The self-developed viscous CFD code HUST-Ship is used for the numerical simulation. The structured overlapping grid and SST k-ω turbulence model was employed. The rotors, pre-swirl stators and duct were monitored separately in order to understand the effect on the thrust coefficient and the torque coefficient. Results of small-scale simulation are in agreement with experimental data. Simulation on large scale pump jet was also completed and the grid independence and time step independence are verified. Scale effect of the pump jet propulsor is analyzed, which can be found among rotors, stators and the duct by investigating the dimensionless velocity field or dimensionless pressure field.

关 键 词：前置定子 泵喷推进器 尺度效应 结构化重叠网格 

分 类 号：U661.313[交通运输工程—船舶及航道工程]