多孔翅片散热器内辐射/对流/导热的耦合传热  

Radiative,convective and conductive coupled heat transfer in the porous fin heat exchanger

作　　者：马菁[1] 孙亚松[2] 

机构地区：[1]长安大学陕西省交通新能源开发应用与汽车节能重点实验室,西安710064 [2]华北电力大学低品位能源多相流与传热北京市重点实验室,北京102206

出　　处：《中国科技论文》2016年第5期520-523,共4页China Sciencepaper

基　　金：国家自然科学基金资助项目(51406014);高等学校博士学科点专项科研基金资助项目(20130036120009)

摘　　要：采用切比雪夫配置点谱方法对多孔翅片散热器内辐射、对流和导热的耦合传热问题进行求解。在多孔翅片散热器内,导热系数、对流换热系数、表面发射率以及内热源均为温度的函数。在求解多孔翅片散热器内耦合传热的过程中,采用切比雪夫配置点谱方法对根据Darcy定律建立的多孔介质传热模型进行离散,并将微分形式的控制方程转换为代数形式的矩阵方程。另外,分析了热物性参数对无量纲温度和翅片效率的影响。通过与文献中同伦摄动法的计算结果相比较发现:切比雪夫配置点方法对多孔翅片散热器内耦合传热问题有很好的计算精度。To solve radiative,convective and conductive heat transfer in the porous fin heat exchanger,Chebyshev collocation spectral method（CCSM）was adopted in this paper.In this porous fin heat exchanger,thermal conductivity,heat transfer coefficient,surface emissivity and internal heat generation are functions of temperature.In the procedure of solving the porous fin heat exchanger,CCSM was used to discretize the porous heat transfer model which is based on Darcy law,and the differential form of control equation was transformed to the matrix form of algebraic equation.Otherwise,the effects of thermos-physical parameters on dimensionless temperature and fin efficiency were also analyzed.Compared with the homotopy perturbation solution in literature,CCSM can obtain a good computation accuracy for coupled heat transfer in the porous fin heat exchanger.

关 键 词：多孔翅片 辐射、对流和导热耦合 翅片效率 切比雪夫配置点谱方法 

分 类 号：TK172[动力工程及工程热物理—热能工程] TK124