三维水翼梢涡气核运动特性的数值模拟  

Numerical simulation of nuclei motion characteristics in a three-dimensional hydrofoil tip vortex flow field

作　　者：郭春雨[1] 薛嵘 胡健[1] 王恋舟 GUO Chunyu;XUE Rong;HU Jian;WANG Lianzhou(College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China;School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 611756, China)

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001 [2]西南交通大学力学与工程学院,四川成都611756

出　　处：《哈尔滨工程大学学报》2021年第5期618-625,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51679045,51579052).

摘　　要：针对三维水翼梢涡处流场和气核运动特性的问题,采用LES湍流模型和DEM模型进行数值分析。对有攻角水翼梢部进行网格加密,成功捕捉到梢涡结构,在这个基础上添加DEM模型构建的气核,研究气核在梢涡影响下的运动规律。数值结果表明:该方法很好地模拟了带导流罩水翼梢涡形成与发展的过程,得出了直径为100μm的气核在梢涡影响下的迁移轨迹,以及在迁移过程中表面压力、运动速度等的变化特性。该研究结果为梢涡空化初生的机理建立了很好的基础。Aiming toward the flow field and motion characteristics of nuclei at the tip vortex region of a three-dimensional hydrofoil,this study used a LES turbulence model and DEM model in a numerical simulation.By refining the mesh of the tip part of a hydrofoil on the basis of the angle of attack,we captured the structure of the tip vortex.The nuclei were subsequently established by the DEM model and then added to the flow field to research the motion law.Simulation results showed the good simulation of the generation and development of the tip vortex of a hydrofoil with fairing.The track of the nuclei whose diameter was 100μm was obtained,and the varying characteristics of surface pressure,velocity,etc.in the migration process were calculated.This research builds a foundation for the mechanism of the cavitation inception phenomenon.

关 键 词：水翼 数值模拟 大涡模拟 离散元方法 梢涡 涡核 气核 气核轨迹 

分 类 号：U661.1[交通运输工程—船舶及航道工程]