顶棚烟道对隧道火灾烟气蔓延影响的CFD分析  

CFD Analysis of Smoke Pervasion in the Tunnel with Flue Under Fire

作　　者：李艳玲[1] 龙新峰[1] 

机构地区：[1]华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室,广州510640

出　　处：《世界科技研究与发展》2008年第6期812-815,共4页World Sci-Tech R&D

摘　　要：基于一种顶棚设有烟道的新型隧道结构,采用FDS软件,对该隧道内发生火灾时的烟气蔓延情形进行了模拟分析,并与常规隧道进行了比较。结果表明:烟道口的设置缩短了烟气的回流距离,降低了人员逃生的相对长度,但使得位于火源点2端烟道口内外侧的隧道上部烟气浓度均有所增高;烟道口处设有一定的排风时,可加速烟气进入烟道,从而提高烟气排出的速度,使得2端烟道口外侧的烟气浓度大大降低,提高了人员逃生的安全系数,也使得火灾发生时消防人员可从上、下游两个方向对火灾进行扑救。该种隧道结构为人员逃生、消防人员对火灾的扑救、隧道结构的维护提供了一种新的方式。Based on a new type of tunnel configuration model with flue in the top of it,the paper simulated the smoke pervasion when fire happens in this type of tunnel by FDS. The result shows that the setting up of the flue outlet reduces the backing up distance of the fire smoke, and the distance of people fleeing is also shortened. But under this condition ,the smoke density inside and outside of the two flue outlet will increase. The exhausted velocity designed at flue outlet can accelerate the move of the smoke, and makes the fire smoke density outside of the flue outlet reduce greatly. This situation will offer a relatively safe space for people fleeing,and fire rescuing can also be carried out from two directions. This type of tunnel configuration give a new reference mode for the flee of the personnel, fire rescuing and the maintenance of the tunnel.

关 键 词：FDS 隧道火灾 烟道口 烟气浓度 排风风速 

分 类 号：X928.7[环境科学与工程—安全科学]