金属泡沫管内强制对流换热的数值模拟  

Numerical Simulation of Convective Heat Transfer in Metal Foam Filled Pipes

作　　者：李盈海[1] 陶文铨[1] 孙东亮[1] 赵长颖[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室

出　　处：《西安交通大学学报》2008年第3期261-264,共4页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50576069);国家重点基础研究发展规划资助项目(2006CB601203)

摘　　要：对空气在金属泡沫管内的强制对流换热进行了二维数值模拟.动量方程采用Brinkman-Forchheimer扩展达西模型,能量方程采用考虑流体和固体局部不平衡的二方程模型,并用金属泡沫方形通道的试验数据验证了程序的正确性.模拟结果表明:金属泡沫管的努塞尔数随孔隙率的减小或孔密度的增加而增大,且随流体和固体导热系数比值的减小而增大;金属泡沫管的强化换热效果十分明显,但其压降远大于光管.数值模拟结果与相关文献的结果符合较好.2D convective heat transfer enhancement in metal foam filled pipe is numerically simulated. The momentum equation is formulated based on the Brinkman-Forchheimer extended Darcy model, and the energy equations for both solid and fluid are established following the twoequation non-equilibrium model. The computational code is validated by the experimental data from metal foam filled channel. The numerical results show that the Nusselt number increases when porosity decreases or pore density increases, the Nusselt number also rises with the decreasing thermal conductivity ratio of fluid to solid. Metal foam filled pipe enables to enhance the heat transfer greatly but with a more remarkable pressure drop. The numerical result agrees well with the published literatures .

关 键 词：强制对流 强化换热 金属泡沫管 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]