侧部点式排烟隧道火灾临界风速研究

doi:10.16265/j.cnki.issn1003-3033.2021.03.015

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (3): 105-111.doi: 10.16265/j.cnki.issn1003-3033.2021.03.015

侧部点式排烟隧道火灾临界风速研究

姜学鹏^1,2,3 教授, 陈欣格^1,2, 郭昆^1,2

1 武汉科技大学资源与环境工程学院,湖北武汉 430081;
2 武汉科技大学消防安全技术研究所,湖北武汉 430081;
3 武汉科技大学湖北省工业安全工程技术研究中心,湖北武汉 430081

收稿日期:2020-12-18 修回日期:2021-02-05 出版日期:2021-03-28 发布日期:2021-12-20
作者简介:姜学鹏 (1976—),男,山东平度人,博士,教授,博士生导师,主要从事隧道及地下空间火灾动力学与防治等方面的研究。E-mail:jxp5276@126.com。
基金资助:
国家自然科学基金资助(51874213,51806156);湖北省重点研发计划项目(2020BCB702)。

Study on critical velocity of lateral point smoke extraction tunnel fire

JIANG Xuepeng^1,2,3, CHEN Xin'ge^1,2, GUO Kun^1,2

1 School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;
2 Fire Safety Technology Institute, Wuhan University of Science and Technology, Wuhan Huhei 430081,China;
3 Hubei Provincial Industrial Safety Engineering Technology Research Center, Wuhan University of Science and Technology, Wuhan Hubei 430081, China

Received:2020-12-18 Revised:2021-02-05 Online:2021-03-28 Published:2021-12-20

摘要/Abstract

摘要： 为得到侧部点式排烟模式隧道火灾临界风速无量纲计算式,针对隧道侧部点式排烟模式,根据π定理和相似理论,采用量纲分析方法分析影响临界风速的相关因素,推导出影响临界风速3个因素的无量纲函数关系式;采用数值模拟方法,确定临界风速与火灾热释放速率、排烟量、排烟口距火源距离的量化关系。研究结果表明:当无量纲排烟口距火源距离小于2.22时,临界风速随排烟口距火源距离的增大呈1/25次方的增长关系,随排烟量的增大呈-3/50次方减小关系;当无量纲排烟口距火源距离大于2.22时,临界风速不再随排烟口距火源距离和排烟量的变化而改变;临界风速始终随火灾热释放速率的增大呈1/3次方增长关系。

关键词: 侧部点式排烟, 隧道火灾, 临界风速, 无量纲, 数值模拟

Abstract: In order to obtain dimensionless formula to calculate critical velocity of tunnel fire in lateral point smoke extraction pattern, dimensional analysis was made on relevant influencing factors of critical velocity according to π theorem and similarity theory, and a dimensionless functional relation of three influencing factors were derived. Then, numerical simulation was conducted to define quantitative relationship between critical velocity and fire heat release rate, smoke exhaust volume and distance between smoke vent and fire source. The results show that when distance between dimensionless smoke vent and fire source is less than 2.22, critical velocity increases along with increase of distance by 1/25 power, but decreases along with increase of smoke exhaust by -3/50 power. However, when it is greater than 2.22, critical velocity no longer changes with either distance or smoke exhaust. Meanwhile, with increase in heat release rate, it always rises by 1/3 power.

Key words: lateral point smoke extraction, tunnel fire, critical velocity, dimensionless, numerical simulation

中图分类号:

X932

姜学鹏, 陈欣格, 郭昆. 侧部点式排烟隧道火灾临界风速研究[J]. 中国安全科学学报, 2021, 31(3): 105-111.

JIANG Xuepeng, CHEN Xin'ge, GUO Kun. Study on critical velocity of lateral point smoke extraction tunnel fire[J]. China Safety Science Journal, 2021, 31(3): 105-111.

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侧部点式排烟隧道火灾临界风速研究

Study on critical velocity of lateral point smoke extraction tunnel fire

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