小型混凝土空心砌块墙热阻的数值优化

摘要

Numerical simulation of coupled heat transportation that includes natural convection, radiation and conduction through the small concrete hollow block wall is carried out, and thermal resistance is predicted to find the optimum configuration of the hollow wall. Moreover, effects of radiation heat transfer and void fraction as well as the number of holes on the thermal resistance of hollow block wall are analyzed.%对小型混凝土空心砌块墙的固体导热、空气自然对流以及孔壁间辐射的耦合换热过程进行了数值模拟,得出了空心墙体的当量热阻值,并以墙体当量热阻为标准找出了此种空心砖的最优孔洞结构.另外还分析得出了孔隙率和孔数目对孔壁辐射换热以及空心砌块墙体当量热阻的影响规律.