综合管廊火灾探测模拟研究  

Simulation Research on Fire Detection in Utility Tunnel

作　　者：白振鹏 李炎锋[1] 李俊梅[1] 王致远 黄有波 BAI Zhenpeng;LI Yanfeng;LI Junmei;WANG Zhiyuan;HUANG Youbo(Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学北京绿色建筑与节能技术重点实验室,北京100124

出　　处：《北京工业大学学报》2020年第5期476-482,共7页Journal of Beijing University of Technology

基　　金：国家重点研发计划资助项目(2017YFC0805008)。

摘　　要：为了解决综合管廊中基于火灾迅速报警需求的火灾探测器合理布置问题,提出一种火源热能换算系数的数学模型,通过建立三维综合管廊模型,应用FDS软件进行模拟研究.分析综合管廊不同宽度和高度对管廊发生火灾时温度的影响.另外,对数学模型及模拟结果与前人研究结果对比,验证了该数学模型的正确性.研究结果表明:距火源位置越远,管廊顶部热烟气温度达到最大值的时间越长,热空气层厚度和烟气层的厚度均受管廊宽度、高度的影响,火源的热能换算系数与管廊当量直径成正相关.当综合管廊截面的宽度、高度变化范围在1.40~2.60 m时,建议火灾探测器安装间距为5.00 m,它在30 s之内可以确定火源的位置.To solve the problem of fire alarm in utility tunnel,the installation distance of fire detector was arranged reasonably.In this paper,a mathematical model of conversion coefficient of heat energy from fire source was presented.Through the establishment of a three-dimensional utility tunnel,a simulation study was conducted by using FDS software.The influence of different width and height of utility tunnel was analyzed on the temperature.In addition,the correctness of the mathematical model was verified by comparing the mathematical model and the simulation results with previous research results.Results show that the farther away from the fire source,the longer the maximum temperature of hot smoke at the top of the utility tunnel.The thickness of the hot air layer and the smoke layer are affected by the width and height of the utility tunnel.The conversion coefficient of the heat energy of the fire source is positively correlated with the equivalent diameter of the utility tunnel.When the width and height of the section of the utility tunnel varies from 1.40 m to 2.60 m,the installation distance of fire detector is suggested to be 5.00 m,and the location of fire source can be determined within 30 s.

关 键 词：综合管廊 火灾探测 烟气 温度 热释放值 模拟研究 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]