不同柱体布局模式下圆柱贴附通风气流组织特性研究

Air distribution characteristics of circular column attached ventilation under different column layout modes

针对大空间建筑中存在的多种圆柱布局模式,研究了单、双及四柱贴附通风气流组织特性。选取14种柱体布局模型,采用流场可视化实验和数值模拟方法研究了圆柱贴附通风的流场形态和气流组织特性,并选取速度场、温度场、头脚温差、吹风感指数和通风效率分析了4种单柱布局模式的通风性能。结果表明:单、双及四柱贴附通风均能在工作区形成类似于置换通风的空气湖气流组织分布;双柱和四柱贴附通风可以简化为单柱通风模式来研究。

For various circular column layout modes in large space buildings,studies the air distribution characteristics of single,double and four column attached ventilation.Selecting fourteen kinds of column layout models,studies the flow field and air distribution characteristics of circular column attached ventilation by means of flow field visualization experiment and numerical simulation.Evaluates the ventilation performance of the four single column layout modes with velocity field,temperature field,temperature difference between head and foot,draft sensation index and ventilation efficiency.The results show that the single,double and four column attached ventilation can form the air distribution of air lake in the occupied zone,which is similar to the displacement ventilation.Double column and four column attached ventilation can be simplified into single column one for research.