火源横向位置对隧道烟气分布的影响  

The Influence of the Transverse Position of the Fire Source on the Smoke Distribution in the Tunnel

作　　者：王文 孙三祥[2] 石彬彬 Wang Wen;Sun Sanxiang;Shi Binbin(Shaanxi Railway Institute,Weinan,714000;School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou,730070;Gansu Forestry Polytechnic,Tianshui,741020)

机构地区：[1]陕西铁路工程职业技术学院,渭南714000 [2]兰州交通大学环境与市政工程学院,兰州730070 [3]甘肃林业职业技术学院,天水741020

出　　处：《制冷与空调（四川）》2020年第2期273-278,共6页Refrigeration and Air Conditioning

基　　金：甘肃省重点研发计划(17YF1GA010)。

摘　　要：依托工程实际,采用数值模拟方法研究隧道火源位于不同车道时,隧道临界风速、温度、烟雾分布扩散规律。结果表明:纵向通风速度不大于临界通风速度时,火源下游段隧道棚顶温度呈e函数下降,当通风速度大于临界通风速度时,该规律不再适用。火源位于侧壁面时,由于隧道侧壁面的限制作用,其近火源区烟气运移呈“之”字形向隧道出口处蔓延,隧道棚顶不同纵向温度线呈滚动式交替变化。Based on the engineering practice,the numerical simulation method is used to study tunnel critical wind speed,the distribution and diffusion law of temperature and smoke,when the tunnel fire source is located in different lanes.The results show that when the longitudinal ventilation speed is not greater than the critical ventilation speed,the tunnel roof temperature in the downstream section of the fire source decreases as an e-function.When the ventilation speed is greater than the critical ventilation speed,the rule is no longer applicable.When the fire source is located on the side wall,due to the restriction of the side wall of the tunnel,the flue gas migration near the fire source area spreads to the exit of the tunnel in a zigzag shape,and the different longitudinal temperature lines on the roof of the tunnel change alternately in a rolling manner.

关 键 词：数值模拟 临界风速 烟雾分布 滚动式 

分 类 号：U445[建筑科学—桥梁与隧道工程]