摘要
通过对高亚临界雷诺数圆柱绕流的数值计算,来比较ISAS、DES、SAS湍流模型的流场调控机制及对大分离流动的解析能力。数值结果表明:3种模型均表现出良好的湍流谱生成能力,SAS模型计算的黏度水平稍高,表现出较大的耗散性;ISAS模型有效改善DES模型使用网格尺度时的网格敏感问题,计算的剪切层及统计物理量更接近实验值;与SAS模型相比,ISAS更加简化、直观,方程求解效率能得到明显提升。
Based on the numerical calculation of cylinder flow at high sub-critical Reynolds number,the flow field control mechanism of the turbulence models of ISAS,DES and SAS and the resolution capability of most separate flow are compared.The numerical results show that the three models all perform well in generating turbulence spectrum,but the viscosity level calculated by SAS model is a bit higher with gerater dissipation,and ISAS model effectively improves the grid sensitiveness when using grid scale by DES model,and its calcullated shear layers and statistical physical quantities are more close to experimental values.Compared with SAS model,ISAS model is even more simplified,intuitive and efficient in equation solving.
作者
常玲玲
刘跃
宁春梅
CHANG Lingling;LIU Yue;NING Chunmei(Engineering Research Center of Aerospace High-end Manufacturing-Universities of Shaanxi Province,Shaanxi Institute of Technology,Xi'an 710302,China)
出处
《机械制造与自动化》
2025年第4期155-158,169,共5页
Machine Building & Automation
基金
陕西省教育厅重点科研课题项目(24JR019)
陕西国防学院工程中心专项项目(Pt24-04)
陕西国际工业职业技术学院科研课题(Gfy23-25)。
关键词
湍流模型
尺度自适应模拟
分离涡模拟
圆柱绕流
数值模拟
turbulence model
scale-adaptive simulation
detached-eddy simulation
cylinder flow
numerical simulation
