|本期目录/Table of Contents|

[1]李智胜,蒋浩锴,高云骥,等.分岔隧道火灾烟气流动特性研究*[J].中国安全生产科学技术,2021,17(5):118-122.[doi:10.11731/j.issn.1673-193x.2021.05.018]
 LI Zhisheng,JIANG Haokai,GAO Yunji,et al.Study on flow characteristics of fire smoke in bifurcated tunnel[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(5):118-122.[doi:10.11731/j.issn.1673-193x.2021.05.018]
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分岔隧道火灾烟气流动特性研究*
分享到:

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
17
期数:
2021年5期
页码:
118-122
栏目:
职业安全卫生管理与技术
出版日期:
2021-05-31

文章信息/Info

Title:
Study on flow characteristics of fire smoke in bifurcated tunnel
文章编号:
1673-193X(2021)-05-0118-05
作者:
李智胜蒋浩锴高云骥靳开颜张玉春李涛
(西南交通大学 地球科学与环境工程学院,四川 成都 610031)
Author(s):
LI Zhisheng JIANG Haokai GAO Yunji JIN Kaiyan ZHANG Yuchun LI Tao
(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China)
关键词:
分岔隧道烟气CFD火源位置纵向衰减
Keywords:
bifurcated tunnel smoke CFD fire source location longitudinal attenuation
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2021.05.018
文献标志码:
A
摘要:
为探究分岔隧道烟气流动特性,采用CFD数值仿真技术,选取3个火源位置、5个热释放速率,模拟分析顶棚最大温升、主隧道及岔道内顶棚下方温度纵向衰减规律。结果表明:火源位置对顶棚下火源正上方最大温度影响较小,最大温差约为34 ℃,但对火源附近温度影响较大,其中距火源0.5 m处最大温差约为110 ℃;通过对比Hu等和Gong等的预测模型在岔道内顶棚下温度纵向衰减上的拟合曲线可知,Gong等的模型准确性更高;主隧道内上、下游顶棚下温度纵向衰减呈现出不同程度的“反超现象”,且随火源位置逐渐移向岔道内时,“反超现象”逐渐滞后。
Abstract:
In order to explore the flow characteristics of fire smoke in the bifurcated tunnel,the CFD numerical simulation technology was used to simulate and analyze the maximum temperature rise of ceiling and the longitudinal temperature attenuation under the ceiling in the main and branch tunnels with selecting three fire source locations and five heat release rates.The results showed that the fire source location had little effect on the maximum temperature under the ceiling above the fire source,with the maximum temperature difference of about 34 ℃,while it had greater influence on the temperature near the fire source,and the maximum temperature difference at the location of 0.5 m away from the fire source was about 110 ℃.By comparing the fitting curves of longitudinal temperature attenuation under the ceiling in the branch tunnel by the Hu and Gong’s prediction models,it was found that the Gong’s model was more accurate.The longitudinal temperature attenuation under the ceiling in the upstream and downstream of main tunnel presented different degrees of “overpass phenomenon”,and when the fire source location gradually moved to the branch tunnel,the “overpass phenomenon” gradually lagged behind.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2020-09-16;网络首发日期: 2021-05-06
* 基金项目: 国家自然科学基金项目(51578464);四川省科技厅项目(2020YFH0045);中央高校基本科研业务项目(2682019CX17)
作者简介: 李智胜,博士研究生,主要研究方向为隧道及地下空间火灾防治。
通信作者: 张玉春,博士,教授,主要研究方向为地下空间通风理论设计及火灾防控。
更新日期/Last Update: 2021-06-03