基于LES的线性分层流尾迹分析  

Large-Eddy Simulation Based Linear Stratified Flow Wake Analysis

作　　者：刘心怡 Xinyi Liu(Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai)

机构地区：[1]上海理工大学能源与动力工程学院,上海

出　　处：《建模与仿真》2024年第3期3687-3695,共9页Modeling and Simulation

摘　　要：采用LES(Large-eddy Simulation,大涡模拟)研究亚临界雷诺数Re=3700下,分层效应对球后尾迹的影响。选取了Fr=0.05、∞,利用UDF(User Defined Function)建立密度线性分层分布,从运动球体的尾迹特征、漩涡结构、速度分布、等分析分层的存在对尾迹的影响。研究表明:分层的存在导致尾迹垂向抑制和速度分布各向异性增强;同时分层对涡结构和涡脱落也有重要的影响。Large-eddy Simulation(LES)was used to study the effect of stratification on the wake of the sphere at subcritical Reynolds number Re=3700.Fr=0.05 and∞were selected,and the linear hierarchical distribution of density was established by using the User Defined Function(UDF).The influence of the existence of stratification on the wake was analyzed from the wake characteristics,vortex structure,velocity distribution,and so on.The results show that stratification leads to ver-tical suppression of wake and enhanced anisotropy of velocity distribution.Stratification also has important effects on vortex structure and vortex shedding.

关 键 词：大涡模拟 分层效应 尾迹特征 漩涡结构 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]