多孔泡沫介质有效导热系数的研究  

Study of the effective thermal conductivity of highly porous foams

作　　者：王济平[1] 张新铭[1] 凌娅[1] 谷沁洋[1] 

机构地区：[1]重庆大学动力工程学院低品位能源利用技术及系统教育部重点实验室,重庆400030

出　　处：《炭素技术》2013年第1期13-16,共4页Carbon Techniques

基　　金：重庆市科技攻关计划资助项目(81826);“211工程”三期建设项目(S-09101)

摘　　要：在平面热阻模型基础上,考虑多孔介质固、流两相导热系数、孔隙率以及孔隙分布等因素的影响,通过引入倾斜角α,提出了一个预测多孔泡沫介质有效导热系数的数学模型。通过对本文模型的预测结果与国内外有关多孔泡沫介质有效导热系数的实验数据以及其他预测模型的预测结果进行比较,验证了本文所得数学模型的准确性。Based on resistor mode, an angle a was introduced with taking account of the thermal conductivity of solid-fluid two phases, porosity and the random distribution of pore structure, and a mathematical model for predicting effective thermal conductivity of porous foams has been developed. The predicted values of the model were compared with the experimental date , and the results of other models which predict effective thermal conductivity of porous foams both in domestic and foreign, verified the accuracy of the mathematical model derived in this paper.

关 键 词：多孔泡沫 有效导热系数 预测模型 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TB34[动力工程及工程热物理—热能工程]