基于低温送风的地铁站厅气流组织特性

Air Distribution Performance Based on Cold Air Distribution in Subway Station Hall

为探究大跨度地铁站厅内低温送风的热舒适性,以成都地铁6号线作为研究对象,设计了30°,60°和90°三种不同的送风倾角工况,利用CFD软件分析了不同倾角条件下低温送风对厅内气流组织的影响,并利用有效风感温度和空气分布特性分析了厅内的热舒适满意程度。结果表明:送风倾角为90°时的气流组织最佳,此时厅内的温度及速度不均匀系数最小,空气分布特性值也最大,气流组织满意程度依次为90°>60°>30°。低温送风的送风倾角工况对地铁站厅内的气流组织、热舒适性有显著影响。

In order to study the thermal comfort based on cold air distribution in large-span subway station hall and taking Chengdu metro line 6 as an example,three different air supply angle conditions of 30°,60°and 90°were designed,the air distribution performance of different supply air conditions based on CFD was analyzed,and the thermal comfort satisfaction based on the effective draft temperature(EDT)and air diffusion performance index(ADPI)was studied.The results show that air distribution performance is the best when air supply angle is 90°,the non-uniform coefficient of temperature and speed is minimum,and ADPI is maximum.The satisfaction level of air distribution is 90°>60°>30°.The air distribution and thermal comfort in subway station hall are significantly affected by the cold air supply angle conditions.