通风条件对隧道内双火源火灾影响的数值研究  

Numerical simulation on the influence of ventilation conditions on double fire sources in tunnel

作　　者：黄子候 丁智伟 HUANG Zihou;DING Zhiwei(CRRC Zhuzhou Locomotive Co.,Ltd.,Zhuzhou 412001,China)

机构地区：[1]中车株洲电力机车有限公司,湖南株洲412001

出　　处：《技术与市场》2024年第7期36-41,47,共7页Technology and Market

摘　　要：隧道火灾对于交通运输及人员安全的威胁较大,一旦发生火灾,极易形成多点火源,造成更为严重的二次伤害。利用火灾动力学模拟工具(fire dynamics simulator, FDS)对自然通风、纵向通风条件下隧道内双火源火灾进行数值仿真,探究不同通风条件下隧道内双火源火灾的温度分布,以及纵向通风风速对温度分布的影响规律。仿真结果表明:隧道自然通风情况下,隧道顶棚最高温升随着火源间距增大而降低;纵向通风情况下,顶棚最高温升随着风速增大而降低。Tunnel fire is a great threat to transportation and personnel safety,and once a fire occurs,it is easy to form multiple fire sources,resulting in more serious secondary injuries.In this paper,FDS is used to conduct numerical simulation of double fire sources in tunnels under natural and longitudinal ventilation conditions,and the temperature distribution of double-fire source fires in tunnels under different ventilation conditions is investigated,as well as the influence law of wind speed on temperature distribution.The simulation results show that:in the case of natural ventilation,the maximum temperature rise of the tunnel ceiling decreases with the increase of the distance between fire sources;in the case of longitudinal ventilation,the maximum temperature rise of the tunnel ceiling decreases with the increase of the wind speed.

关 键 词：自然通风 纵向通风 隧道火灾 双火源 数值模拟 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]