地铁排烟风亭与出入口合理的相对位置

为防止发生地铁火灾时排烟风亭排出的烟气通过出入口倒流回车站，用FDS（火灾动力学模拟器）场模拟软件对火灾发生时排烟口烟气蔓延、分布规律及其影响因素进行了研究．模拟结果表明：排烟风亭排出的烟气倒流回出入口的可能性大小与烟气温度、其与出入口的空间距离、自然风的方向和大小等因素有关．现场试验结果证实了模拟结果的正确性．

Numerical Simulation of Reasonable Relative Position of Smoke Tower and Passageway of Subway Station

FDS(fire dynamics simulator),a field simulation software,was used to investigate the spread regularity of smoke and its influencing factors in order to determine the reasonable relative position of smoke tower and passageway of a subway station to prevent the smoke extracted through the smoke tower when a subway fire occurs running back into the station.The simulation results indicates that the possibility that the smoke extracted through a smoke tower runs back into a subway station through its passageway is related to smoke temperature,spatial distance between a smoke tower and a passageway,and direction and strength of nature wind and so on.A field experiment shows the availability of the simulation results.