摘要
城市交通联系隧道由于结构特殊性,在进行通风排烟设计时,既要考虑阻止火灾烟气逆流,还要防止火灾烟气过度蔓延,针对该问题引入限制风速的概念。以某UTLT为实例,利用经验公式计算得到临界风速值,在此基础上通过CFD数值模拟,分析了不同纵向风速条件下隧道内火场温度及烟气的分布情况,并结合火灾烟气蔓延距离提出了小汽车火灾的限制风速建议值,以期为此类隧道的通风排烟设计提供参考。
Due to the structural particularity of urban traffic link tunnel,both backflow of fire smoke and excessive spread should be considered in ventilation design.The idea of limited velocity was put forward to solve this problem.Taking an UTLT as example,the critical velocity was calculated by empirical formula.Based on the results,the temperature and smoke distribution under different wind velocities were analyzed,and the limited velocity of car fire accident was suggested considering the smoke spreading distance.The study can provide reference for the ventilation design of such kind of tunnel.
作者
杨永斌
许洁
YANG Yong-bin XU Jie(The Chinese People＇ s Armed Police Forces Academy, Hebei Langfang 065000, China Tianjin Xiqing Fire Detach- mert,Tianjin 300380 ,China)
出处
《消防科学与技术》
CAS
北大核心
2016年第10期1388-1391,共4页
Fire Science and Technology
基金
河北省高等学校科学技术研究项目"公路隧道水喷雾与排烟系统耦合机制研究"(Z2014162)
关键词
城市交通联系隧道
火灾烟气
纵向通风
限制风速
临界风速
urban traffic link tunnel
fire smoke
longitudinal ventilation
limited velocity
critical velocity
