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为提高某地铁站台通风效果,建立了气流运动的数学模型,模拟气流分布,分析了气体流动的计划时间、留置时间和绕行时间对空气龄的影响,通过增加吊顶送风、隧道送风或者串联隧道送风和站台排风的方法优化气流分布,降低了气流绕过楼梯阻碍的时间,从而解决了站台局部空气龄的异常,成功地改善了通风效果.
In order to improve the ventilation effect of a metro station, a mathematical model of the airflow movement was established to simulate the airflow distribution. The influence of the planned time of the airflow, the retention time and the bypass time on the air age was analyzed. By increasing the ceiling air supply, The method of in-line tunnel ventilation and platform exhaust optimize the airflow distribution and reduce the time when the airflow bypass the stairs, thus solving the abnormal local air age and successfully improving the ventilation effect.