粘土空心砖结构优化的数值模拟  

NUMERICAL SIMULATION OF OPTIMIZING CONFIGURATION OF HOLLOW CALY BRICKS

作　　者：李临平[1] 吴志根[1] 李增耀[1] 何雅玲[1] 陶文铨[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,陕西西安710049

出　　处：《工程热物理学报》2008年第5期845-848,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划项目(973)(No.2007CB206902);国家自然科学重点基金项目(No.50636050)

摘　　要：本文采用有限容积法对50种具有不同孔数及排列方式的240×115×90粘土空心砖进行了当量导热系数的三维数值模拟研究.模拟中考虑了粘土空心砖的孔内表面辐射、孔数及排列方式以及室内外温差对其当量导热系数的影响.模拟结果表明:孔内表面辐射对当量导热系数有不可忽略的作用,孔数及排列方式直接影响当量导热系数的值,存在具有最低当量导热系数的粘土空心砖结构.在该结构下空心砖的当量导热系数几乎不随室内外温差的变化而变.模拟结果对粘上空心砖的结构选型、工程设计及建筑节能具有重要的意义。The equivalent thermal conductivities of 50 kinds of hollow clay bricks with the size of 240×115×90 （in mm） and different hole number and arrangement have been predicted numerically by the finite volume method. The influences of the hole surface radiation and the indoor-outdoor temperature difference are also considered. The results reveal that the hole surface radiation can not be neglected. The hole number and arrangement have significant effects on the equivalent thermal conductivity. There is an optimal configuration for which the equivalent thermal conductivity is the lowest. For this optimum configuration its equivalent thermal conductivity does not vary with the indoor-outdoor temperature difference. The simulation results provide valuable data for the hollow brick design in the building engineering.

关 键 词：粘土空心砖 数值模拟 复合传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]