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建筑物绕流的非稳态数值模拟研究 The Unsteady Numerical Simulation of Flow around Building
第27卷第1期 建筑热能通风空调 V01.27No.1 2008年2月 BuildingEnergyEnvironme。nt Feb.2008.1—7 文章编号:1003.0344(2008)01.001—7 建筑物绕流的非稳态数值模拟研究 陈晓春Ⅵ周翔-李宏军-朱颖心1 (1清华大学建筑技术科学系;2中国建筑设计研究院建筑节能与新能源T程中心) 摘要:建筑物绕流是一种典型的钝体绕流形式,而钝体绕流通常具有非稳态流动特征,本文主要工作是对建筑 物绕流的非稳态流场进行数值模拟研究。首先采用了RNGk-e模型对方柱绕流进行非稳态数值模拟研究,通过 与实验以及大涡模拟结果进行比较,发现RNGk-e模型可以获得满意结果;接着又对一种典型的建筑物绕流形 式进行数值模拟研究,分别采用了稳态和非稳态模拟方法,模拟结果表明了采用非稳态数值模拟方法可以获得与 实验以及大涡模拟更为接近的结果。 关键词:建筑物绕流数值模拟RNGk-e模型非稳态雷诺平均方程数值模拟 The SimulationofFlow Numerical around Unsteady Building CHEN Xiao-chunl‘ZHOUXian91,LIHong-junl,ZHUYing—xinl (1 of DepartmentBuildingScience,TsinghuaUniversity; 2 Energy Center.ChinaArchitecture BuildingEngineering DesignResearchGroup) Abstract:Flowaround isa offlowaroundbluffbodiesandflowaroundblu仃bodiesofbenhave buildingtypicalpattem flowcharacter.Themainworkofthis studiesthe flowaround numericalsimulation. unsteady paper unsteady buildingby Firstof I必Gk-emodeliStosimulatethe flowaround showsthatthe all,the adopted unsteady squarecylmder.research resultsof numericalsimulationcould reflectthebasiccharacteristicsofflowandfitswellwiththe unsteady effectively andLESsimulationresults.Thenthe and simulationsarecarriedout to experimental steadyunsteady respectivelystudy flowaround of method that resultsfitswellwiththe andLES building.Researchunsteady shOWNthe expefimenml simulation resultsof numericalsimulationwere differentfromthe results. results.However,the
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