平屋顶水平封闭方腔空气层厚度数值分析  

Numerical Analysis of Air Layer Thickness of Horizontally Enclosed Square Cavity

作　　者：何方祥 詹树林[1] 赖俊英[1] 

机构地区：[1]浙江大学土木工程学系,杭州310027

出　　处：《上海交通大学学报》2016年第3期384-388,394,共6页Journal of Shanghai Jiaotong University

基　　金：国家"十二五"科技支撑计划课题(2013BAL01B00)资助

摘　　要：为分析平屋顶水平封闭方腔作为保温系统时其内部空气层的相对最佳厚度,通过建立二维数值模型,选择"Presto!"压力插值格式及SIMPLE(Semi-Implicit Method for Pressure-Linked Equations)解耦算法,计算了在不同边界温差和边界材料导热系数下平屋顶水平封闭方腔内辐射传热量和对流换热量及其随空气层厚度的变化.在一定条件下,通过对计算结果进行回归分析,得到平屋顶水平封闭方腔在不同温差和不同边界材料导热系数下的相对最佳空气层厚度值.In order to analyze the relatively optimal air layer thickness of the horizontally enclosed square cavity based on its thermal insulation, this paper established a two-dimensional numerical model and calcu- lated the radiation and convection heat transfer in the horizontally closed square cavity at different tempera- ture differences and different thermal conductivities of the solid boundary material by using the ＂Presto!＂ pressure interpolation scheme and SIMPLE （semi-implicit method for pressure-linked equations） decou- pling algorithm. The relative optimal air layer thickness values of the horizontally closed square cavity at different temperature difference and thermal conductivity of the boundary material under a certain condition were obtained from the regression analysis of the results.

关 键 词：水平封闭方腔 数值计算 最佳空气层厚度 回归分析 

分 类 号：TU114.4[建筑科学—建筑理论]