翅片管束大空间自然对流三维数值模拟  

Three-dimensional Numerical Simulation of Natural Convection in Large Space of Finned Tube Bundles

作　　者：马腾飞 王文[1] 叶成[2] 左巧林[2] MA Tengfei;WANG Wen;YE Cheng;ZUO Qiaolin(Institute of Refrigeration Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Nuclear Engineering Research and Design Institute,Shanghai 200233,China)

机构地区：[1]上海交通大学制冷与低温研究所,上海200240 [2]上海核工程研究设计院,上海200233

出　　处：《制冷技术》2019年第3期57-61,共5页Chinese Journal of Refrigeration Technology

基　　金：国家科技重大专项(No.2015ZX06004002)

摘　　要：本文对大尺寸热管冷凝段管束的大空间自然对流散热进行了数值模拟,采用多孔介质简化模型,附加热源分别采用体积热源和面热源两种方式。首先采用较小的管束模型对简化方法的准确性进行验证,结果显示模型简化前后计算得到的掠管风速相差约10%,准确度较高。在此基础上对大尺寸大数量的翅片管束自然对流进行仿真计算,结果表明,两种热源设置方式得到的管束区域空气平均流速基本相等。简化后可以在计算能力允许的范围内对管束区域的空气流动宏观参数进行模拟计算,为热管管束换热系统的设计提供数据参考。The large-space natural convection of large-sized heat pipe bundle is numerically simulated.The porous medium is used to simplify the model,and the volume and surface heat sources are adopted respectively.The accuracy of the simplified method is verified by a small tube bundle model.The results show that the difference of wind speeds calculated before and after the model simplification was about 10%,which means that the accuracy is high.On the basis of the verification,the natural convection simulation results of large number of finned tube bundles show that the average airflow velocity in the tube bundle region obtained with two kinds of heat sources is basically equal.After simplification,the macroscopic parameters of the air flow in the tube bundle region can be simulated within the range allowed by the calculation capability,which provides data reference for the design of the heat pipe bundle heat exchange system.

关 键 词：翅片管束 自然对流 CFD 多孔介质 

分 类 号：TK124[动力工程及工程热物理—工程热物理]