干挂石材幕墙传热性能的三维数值研究

Three-dimensional Numerical Study on Heat Transfer Performance of Dry-hung Stone Curtain Wall

背栓式干挂石材幕墙传热在国内高层建筑中应用日益广泛,但其尺寸庞大、结构复杂的特点使得此类墙体的稳态热工性能实验数据难以测得,国家规范图集中也未列出。在结构复杂的空间内采用源项协同和网格映射方法生成了计算网格;分析发现了幕墙石材由于空气夹层较厚且内部存在多个形状复杂的零件,内部空气在夹层两侧温差较大时处于紊流状态,计算结果表明辐射因素必须考虑;揭示了幕墙空气层的温度及速度分布特点。

The heat transfer of the back bolt dry-hung stone curtain wall is increasingly widely used in the high buildings in China,but its large size and complex structure make it difficult to measure the steady thermal performance and collect the test data of this kind of wall which has not been listed in the national standard chart.In this paper,in the complex space,the source term synergy and grid mapping method are used to generate the grid.Through comparison and analysis,it is found that the air layer in the curtain wall is different from the air layer in the common hollow brick by the numerical analysis.The internal air is in a turbulent state because the temperature difference between the two sides of the interlayer and there is a large number of complex parts inside.The calculation results show that the radiation factor must be considered in the case.This paper reveals the characteristics of the temperature and velocity distribution of the air layer of the curtain wall.