地铁列车运行速度对客室内火灾烟气扩散的影响  

Influence of Metro Train Running Speed on Fire Smoke Diffusion in Passenger Compartment

作　　者：毛军[1] 王少华 郗艳红[1] 胡嘉伟[1] 王丹[3] MAO Jun;WANG Shaohua;XI Yanhong;HU Jiawei;WANG Dan(School of Civil Engineering,Beijing Jiaotong University,100044,Beijing,China)

机构地区：[1]北京交通大学土木建筑与工程学院,北京100044 [2]北京市市政工程设计研究总院有限公司,北京100082 [3]北京市地铁运营有限公司,北京100044

出　　处：《城市轨道交通研究》2021年第9期186-190,共5页Urban Mass Transit

基　　金：国家重点研发计划项目(2016YFC0802206);国家自然科学基金项目(51578061);中央高校基本科研业务费项目(2019JBM087)。

摘　　要：地铁列车在隧道内运行若遇客室着火,一般继续运行到前方车站进行救援,此时客室内的烟气扩散危及乘客生命安全。以客室内乘客行李着火的场景为例,通过对客室内的温度场和烟气流动进行数值模拟,分析了列车运行速度对客室内烟气扩散过程的影响。结果表明:火灾发生后,客室内的温度和烟气浓度沿纵向均呈不对称形式的增长,后方区域的温度和烟气浓度均高于前方区域的;列车运行速度越高,单位时间内通过客室顶部风口排出客室的烟气越多;后方区域人眼高度位置处的温度和烟气浓度均随列车运行速度呈二次曲线关系减小。When a fire starts in passenger compartment as metro train passing tunnel,the general solution is to continue operation until the next station for rescue,however the fire smoke diffusion in compartment endangers passengers.Taking the scenario of passenger luggage in compartment catching fire as an example,the influence of train speed on the diffusion process of smoke in compartment is analyzed by numerical simulation of the temperature field and smoke flow in the compartment.The results show that after the fire has started,the temperature and smoke concentration in the compartment increase in an asymmetric way along the longitudinal direction,and the temperature and smoke concentration in the rear area are higher than those in the front area.The higher the operating speed of the train,the more smoke is discharged through the air outlet on top of the compartment per unit time.The temperature and smoke concentration at the height of human eyes in the rear area decrease with the speed of vehicle in a quadratic curve.

关 键 词：地铁列车 客室火灾 运动火源 温度分布 烟气 

分 类 号：U298.4[交通运输工程—交通运输规划与管理]