交通活塞风作用下H型隧道火灾烟气蔓延规律数值模拟研究  

Numerical simulation of fire smoke spread in H-type tunnel under action of piston wind

作　　者：文波[1] 王雅娟 WEN Bo;WANG Yajuan(School of Resources Engineering,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055

出　　处：《工业安全与环保》2024年第9期45-49,共5页Industrial Safety and Environmental Protection

摘　　要：为探究非事故隧道交通风对火灾烟气蔓延的影响规律,基于理论分析,通过FDS数值模拟,研究了不同车流量产生的交通风速在H型隧道中不同火源功率情况下对烟气扩散、温度分布和流速变化的影响。结果表明,不同交通风在不同火源功率条件下,烟气扩散、温度分布和流速变化规律基本相同。随着交通活塞风速的增加,横通道两端压力差越大,火灾烟气运动到非事故隧道时间越短,在隧道内蔓延的长度越长;随着火源功率增大,火灾烟气逆流到事故隧道入口和扩散到非事故隧道内的时间越短,非事故隧道内流速场发生变化的时间越晚。In order to explore the influence law of non-accident tunnel traffic wind on fire smoke spread,this paper,based on theoretical analysis and FDS numerical simulation,studied the influence of traffic wind speed generated by different traffic flow on smoke diffusion,temperature distribution and velocity change under different fire source power in H-type tunnel.The results show that the laws of smoke diffusion,temperature distribution and velocity change are basically the same under different traffic winds and different fire power conditions.With the increase of the wind speed of the traffic piston,the greater the pressure difference between the two ends of the cross passage,the shorter the time for the fire smoke to travel to the non-accident tunnel,and the longer the spreading length in the tunnel.With the increase of the power of the fire source,the shorter the time for the fire smoke to reverse to the entrance of the a ccident tunnel and spread to the non-accident tunnel,the later the change of the velocity field in the non-accident tunnel.

关 键 词：H型隧道 隧道火灾烟气 交通活塞风 火灾特性 数值模拟 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]