通风方式对非对称隧道火灾烟气蔓延的影响  

Influence of Ventilation Mode on Smoke Spread in Asymmetric Tunnel Fires

作　　者：肖峻峰 胡涛涛 秦荣水 梁至昕 XIAO Junfeng;HU Taotao;QIN Rongshui;LIANG Zhixin(National-local Joint Engineering Laboratory of Building Health Monitoring and Disaster Prevention Technology,Hefei 230601,China;School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]建筑健康监测与灾害预防技术国家地方联合工程实验室,合肥230601 [2]安徽建筑大学土木工程学院,合肥230601

出　　处：《沈阳理工大学学报》2025年第1期90-96,共7页Journal of Shenyang Ligong University

基　　金：教育部产学合作协同育人项目(220901269155739);安徽省自然科学基金项目(2108085ME159);国家级大学生创新创业训练计划项目(202310878011)。

摘　　要：为研究非对称隧道内不同通风方式对火灾烟气蔓延的影响,利用PyroSim数值模拟软件构建非对称隧道模型,对隧道内烟气流速、温度分布和烟气运动进行研究,并分析了不同风速对人员疏散的影响。结果表明:上坡隧道内诱导气流与补充气流存在竞争关系,随着坡度差增大,烟气流速增加,烟气从上坡隧道排出,新鲜空气从平坡段隧道进入补充燃烧消耗;自然通风下隧道充满烟气,在纵向风速1.5 m/s下隧道环境得以改善;随着风速继续增大,隧道烟气流速紊乱,烟气层被扰乱。在实际非对称隧道中,建议火灾初期以1.5 m/s的纵向风速进行通风,待人员疏散后再增加风速加速排烟。In order to study the effects of different ventilation methods on the spread of fire smoke in asymmetric tunnels,PyroSim numerical simulation software was used to construct an asymmetric tunnel model,to study the smoke flow rate,temperature distribution and smoke movement in the tunnel,and to analyse the effects of different wind speeds on the evacuation of people.The results show that there is a competitive relationship between the induced airflow and the supplementary airflow in the uphill tunnel,and as the difference in slope increases,the flue gas flow rate increases,the flue gas is discharged from the uphill tunnel,and the fresh air enters only from the flat-slope section of the tunnel to supplement the combustion consumption.The tunnel is filled with smoke under natural ventilation,and the tunnel environment is improved under a longitudinal wind speed of 1.5 m/s.As the wind speed continues to increase,the tunnel flue gas flow rate is disturbed and the flue gas layer is disturbed.In practical asymmetric tunnels,it is recommended to ventilate the tunnel with a longitudinal wind speed of 1.5 m/s at the beginning of the fire,and then increase the wind speed to accelerate smoke evacuation after the evacuation of people.

关 键 词：火灾烟气 数值模拟 温度分布 人员疏散 坡度差 

分 类 号：X928.7[环境科学与工程—安全科学]