西南交通大学学报 2009, 44(2) 264-268 DOI:     ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
隧道火灾
临界风速
边界条件
水喷淋
模型试验
本文作者相关文章
李颖臻
雷波
PubMed
Article by LI Yingzhen
Article by LEI Bo

边界条件对隧道火灾模型试验临界风速的影响

李颖臻, 雷波

西南交通大学机械工程学院, 四川, 成都, 610031

摘要

对在火源附近有水喷淋与无水喷淋两种工况进行了小尺寸隧道模型试验,以研究边界条件对隧道火灾模型试验临界风速的影响.结果表明,与无喷淋相比,水喷淋增大了火源附近的对流及辐射热损失,使烟气温度降低,临界风速明显减小.对于小尺寸模型隧道,在火源处采用水喷淋的边界条件比较符合火源附近的壁面换热边界条件,得到的临界风速更合理.

关键词 隧道火灾   临界风速   边界条件   水喷淋   模型试验  

Influences of Boundary Conditions on Critical Velocity in Tunnel Fire Model Test

LI Yingzhen, LEI Bo

School of Mechanical Eng., Southwest Jiaotong University, Chengdu 610031, China

Abstract:

To investigate the influences of boundary conditions on critical velocity,tunnel fire model test was carried out with and without water spray to cool the tunnel walls near the fire source.The results indicate that water spray increases heat loss due to strong convection and radiation near the fire source,cools down the smoke,and decreases critical velocity.The test results with water spray in a small-scale tunnel agree better with data from full-scale tests,and the critical velocity so obtained is more accurate than those without water spray.

Keywords: tunnel fire   critical velocity   boundary condition   water spray   model test  
收稿日期 2008-09-09 修回日期  网络版发布日期  
DOI:
基金项目:

铁道部资助项目子课题(2005G016-C)

通讯作者:
作者简介: 李颖臻(1984- ),男,博士研究生,研究方向为隧道火灾及通风,电话:028-87634859,E-mail:gh8mn4@163.com

参考文献:
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