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[1]王方超,张铎,陈长坤,等.横通道通风对隧道火灾烟气蔓延影响的数值模拟研究*[J].中国安全生产科学技术,2023,19(3):108-114.[doi:10.11731/j.issn.1673-193x.2023.03.016]
　WANG Fangchao,ZHANG Duo,CHEN Changkun,et al.Numerical simulation study on influence of cross-passage ventilation on spread of tunnel fire smoke[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(3):108-114.[doi:10.11731/j.issn.1673-193x.2023.03.016]
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横通道通风对隧道火灾烟气蔓延影响的数值模拟研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年3期
页码:
108-114
栏目:
职业安全卫生管理与技术
出版日期:
2023-03-31

文章信息/Info

Title:
Numerical simulation study on influence of cross-passage ventilation on spread of tunnel fire smoke
文章编号:
1673-193X(2023)-03-0108-07
作者:
王方超; 张铎; 陈长坤; 焦伟冰
（1.黄河勘测规划设计研究院有限公司，河南 郑州 450003；
2.中南大学 防灾科学与安全技术研究所，湖南 长沙 410075）
Author(s):
WANG Fangchao;  ZHANG Duo;  CHEN Changkun;  JIAO Weibing
(1.Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou Henan 450003,China;
2.Institute of Disaster Prevention Science and Safety Technology,Central South University,Changsha Hunan 410075,China)
关键词:
横通道; 火源位置; 临界风速; 烟气层高度
Keywords:
cross-passage;  fire source location;  critical wind velocity;  smoke layer height
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2023.03.016
文献标志码:
A
摘要:
为探究隧道横通道通风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，对不同火源位置的横通道临界风速、主隧道温度分布以及烟气层高度进行研究。研究结果表明：在一定火源功率范围内，隧道横通道临界风速与火源功率的1/3次方成正比且火源距横通道越远，临界风速越小；当火源位于交叉口，横通道使用临界风速通风时，隧道内烟气温度明显降低，烟气迅速沉降到2 m以下；当火源距离交叉口10，20 m，横通道通风会加快火源下游烟气沉降，烟气沉降速度随横通道通风速率的增大而增大；当火源位于交叉口时，烟气沉降由横通道通风对烟气的降温作用和涡旋作用共同主导，当火源位于距离交叉口10，20 m时，烟气沉降主要由涡旋作用主导。
Abstract:
In order to explore the influence of cross-passage ventilation on the smoke spread of tunnel fire,the fire dynamics simulation software FDS was used to study the critical wind velocity of cross-passage,the temperature distribution of main tunnel and the height of smoke layer under different fire source locations.The results showed that within a certain range of fire source power,the critical wind velocity of tunnel cross-passage was proportional to 1/3 power of fire source power,and the farther the fire source was away from the cross-passage,the smaller the critical velocity was.When the fire source was located at the intersection and the cross-passage was ventilated with critical wind velocity,the temperature of smoke in the tunnel decreased obviously,but the smoke would quickly settle to below 2 m.When the fire source was 10 m and 20 m away from the intersection,the cross-passage ventilation would accelerate the downstream smoke settlement of fire source,and the smoke settlement velocity increased with the increase of the cross-passage ventilation rate.When the fire source was located at the intersection,the smoke settlement was dominated jointly by the cooling effect of cross-passage ventilation on the smoke and vortex effect,and when the fire source was located 10 m and 20 m away from the intersection,the smoke settlement was mainly dominated by the vortex effect.

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备注/Memo

备注/Memo:
收稿日期： 2022-07-21
* 基金项目： 重载交通单洞双向特长隧道及隧道群建设与营运安全关键技术（2021KY027）
作者简介： 王方超，硕士，高级工程师，主要研究方向为公路工程。
更新日期/Last Update: 2023-04-12