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[1]李宇辉,费瑞振,等.考虑分岔角度和火源位置的地铁分岔隧道火灾临界风速研究[J].中国安全生产科学技术,2024,20(1):100-106.[doi:10.11731/j.issn.1673-193x.2024.01.015]
　LI Yuhui,FEI Ruizhen,QIAN Shijia.Study on critical wind velocity of subway bifurcated tunnel fire considering bifurcation angle and fire source location[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(1):100-106.[doi:10.11731/j.issn.1673-193x.2024.01.015]
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考虑分岔角度和火源位置的地铁分岔隧道火灾临界风速研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
20
期数:
2024年1期
页码:
100-106
栏目:
职业安全卫生管理与技术
出版日期:
2024-01-31

文章信息/Info

Title:
Study on critical wind velocity of subway bifurcated tunnel fire considering bifurcation angle and fire source location
文章编号:
1673-193X(2024)-01-0100-07
作者:
李宇辉; 费瑞振; 钱世嘉
（1.南京铁道职业技术学院，江苏 南京 210031；
2.中南大学 土木工程学院，湖南 长沙 410075；
3.中国铁路设计集团有限公司，天津 300142；
4.南京地铁运营有限责任公司，江苏 南京 211100）
Author(s):
LI Yuhui;  FEI Ruizhen;  QIAN Shijia
(1.Nanjing Institute of Railway Technology,Nanjing Jiangsu 210031,China;
2.School of Civil Engineering,Central South University,Changsha Hunan 410075,China;
3.China Railway Design Corporation,Tianjin 300142,China;
4.Nanjing Metro Operation Co.,Ltd.,Nanjing Jiangsu 211100,China)
关键词:
地铁分岔联络隧道; 火源位置; 分岔角度; 临界风速
Keywords:
subway bifurcated connection tunnel;  fire source location;  bifurcation angle;  critical wind velocity
分类号:
U458；X947
DOI:
10.11731/j.issn.1673-193x.2024.01.015
文献标志码:
A
摘要:
为探究地铁分岔隧道的分岔角度和火源位置对隧道火灾烟气蔓延的影响规律，使用火灾动力学模拟软件FDS对不同火源位置、火源功率以及分岔角度等火灾场景下的地铁分岔隧道烟气温度分布、临界风速进行研究。研究结果表明：地铁分岔联络隧道的临界风速受表征顶棚最高温升系数α和表征分岔隧道分流量的速度损失系数ζ的耦合影响；临界风速时，隧道火源下游烟气温度符合双指数模型衰减；在本文研究的火源功率范围内，分岔隧道内无量纲临界风速与无量纲火源功率的1/3次方成正比；相同火源功率下，分岔角度对临界风速影响较小，而火源位置对临界风速影响较大，火源位于分岔后的临界风速大小约为分岔前的1/(1－ζ)倍。研究结果可为地铁分岔联络通道的通风排烟系统工程设计提供一定程度的参考。
Abstract:
In order to explore the influence of bifurcation angle and fire source location on the smoke spread of tunnel fire in the subway bifurcated tunnel,the fire dynamics simulation software FDS was used to study the smoke temperature distribution and critical wind velocity in the subway bifurcated tunnel under the fire scenarios of different fire source locations,fire source power and bifurcation angles.The results show that the critical wind velocity of the subway bifurcated connection tunnel is influenced by the coupling effect of the coefficient α,which represents the maximum temperature rise of the ceiling,and the velocity loss coefficient ζ,which represents the fractional flow of the bifurcating tunnel.The temperature attenuation of smoke downstream tunnel fire source conforms to the double exponential model under the critical wind velocity.In the range of fire source power in this study,the dimensionless critical wind velocity in the bifurcating tunnel is proportional to 1/3 power of the dimensionless fire source power.Under the same fire source power,the bifurcation angle has little influence on the critical wind velocity,while the fire source location has a great influence on the critical wind velocity.The critical wind velocity behind the bifurcation is about 1/(1-ζ) times that in front of the bifurcation.The research results can provide a certain reference for the engineering design of the ventilation and smoke exhaust system in the subway bifurcated connection tunnel.

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备注/Memo

备注/Memo:
收稿日期： 2023-02-05
作者简介： 李宇辉，博士，副教授，主要研究方向为轨道交通行车组织。
通信作者： 费瑞振，博士，高级工程师，主要研究方向为隧道及地下工程。
更新日期/Last Update: 2024-02-19