不同湍流模型模拟地铁站台气流组织比较  

Comparison between Simulated Subway Station Thermal Environments by Different Turbulence Models

作　　者：刘庚 刘磊[2] 张鑫[3] 王新轲[3] 

机构地区：[1]西安市地下铁道有限责任公司,西安710016 [2]北京城建设计研究总院有限责任公司,北京100037 [3]西安交通大学人居环境与建筑工程学院,西安710049

出　　处：《都市快轨交通》2012年第2期49-52,共4页Urban Rapid Rail Transit

基　　金：中央高校基本科研业务项目(xjj20100138)

摘　　要：以某地铁站台为例,利用计算流体力学方法,采用标准k-ε模型、RNG k-ε模型、混合长度零方程模型、Chen零方程模型以及v2f模型,对其通风系统下站台、站厅内的温度场和速度场进行数值模拟。通过对不同模型下结果的比较分析,发现Chen零方程湍流模型在较少的收敛迭代次数下,能够得到与标准k-ε模型和RNG k-ε模型较为接近的流场和温度场,而混合长度零方程模型和近年来兴起的v2f模型则与其他模型的计算结果有较大差异。结果表明,在对地铁站台建立热环境数值模型时,湍流模型的选择也需谨慎。For a subway station in Tianjin, temperature fields and velocity fields were simulated by a computational fluid dy-namics （CFD） method adopting 5 turbulence models including the standard k-emodel, RNG k-emodel, mixing length zero e- quation model, Chen＇ s zero equation model and v2f model. A comparison between the simulated resuks showed that the flow field and temperature field obtained by Chen＇ s zero equation turbulence model was close to that by the standard k-emodel and RNG k-smodel with less iteration steps while the results by mixing length equation model and v2 f models were distinct from those by the above three models. Therefore, it should be careful to choose turbulence models when thermal environment is simulated by CFD method.

关 键 词：地铁 站台 计算流体力学 湍流模型 热环境 数值模拟 

分 类 号：U231.5[交通运输工程—道路与铁道工程]