带风口屏蔽门地铁车站自然通风特性的数值模拟

摘要

Simulates the train-induced unsteady air flow by the dynamic mesh method in a full-scale geometry model.Analyses the air flow characteristics in the vents of platform screen doors,tunnel and platform stairway,and the characteristics of the vent shaft.The results show that the piston wind can be utilized in underground railway stations with vented platform screen doors to remove the waste heat in the tunnel and platform,which reduces the energy consumption of ventilation.%建立了全尺寸几何模型,采用动网格方法模拟了地铁列车运行时引起的非稳态流动,分析了屏蔽门风口、隧道区域、站台楼梯口的气流特性及活塞风井特性.结果表明,带风口屏蔽门的地铁车站可以利用活塞风带走隧道及站台余热,从而降低通风能耗.