| 分岔隧道火灾火源位置对临界风速影响的数值模拟分析 |
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| 引用本文： | 陈长坤,焦伟冰,雷鹏,张宇伦,赵小龙.分岔隧道火灾火源位置对临界风速影响的数值模拟分析[J].中国安全生产科学技术,2022,18(3):93-99. |
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| 作者姓名： | 陈长坤 焦伟冰 雷鹏 张宇伦 赵小龙 |
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| 作者单位： | （1.中南大学 防灾科学与安全技术研究所，湖南 长沙 410075；2.清华大学合肥公共安全研究院 灾害环境人员安全安徽省重点实验室，安徽 合肥 230601） |
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| 基金项目： | * 基金项目: 国家重点研发计划项目（2017YFC0805000） |
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| 摘 要： | 为探究分岔隧道火灾火源位置对临界风速的影响规律,使用数值模拟方法对火源位于分岔隧道分岔口前和分岔口后的火灾场景下的临界风速进行研究.研究结果表明:火源位于分岔口后的主隧道时,临界风速明显大于火源位于分岔口前的临界风速;在一定范围热释放速率下,分岔隧道临界风速与热释放速率的1/3次方成正比;在分岔隧道模型中,相同热释放速...
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| 关 键 词： | 分岔隧道火灾 火源位置 临界风速 温度分布 |
Numerical simulation analysis on influence of fire source position on critical wind velocity of bifurcated tunnel fire |
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| CHEN Changkun,JIAO Weibing,LEI Peng,ZHANG Yulun,ZHAO Xiaolong.Numerical simulation analysis on influence of fire source position on critical wind velocity of bifurcated tunnel fire[J].Journal of Safety Science and Technology,2022,18(3):93-99. |
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| Authors: | CHEN Changkun JIAO Weibing LEI Peng ZHANG Yulun ZHAO Xiaolong |
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| Institution: | (1.Institute of Disaster Prevention Science and Safety Technology,Central South University,Changsha Hunan 410075,China;2.Anhui Province Key Laboratory of Human Safety,Hefei Institute for Public Safety Research,Tsinghua University,Hefei Anhui 230601,C |
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| Abstract: | In order to explore the influence of fire source location on the critical velocity in bifurcated tunnel fire,the numerical simulation method was used to study the critical wind velocity in fire scenes when the fire source was located in front of and behind the bifurcation point of bifurcated tunnel.The results indicate that the critical velocity of the fire source behind the bifurcation is obviously greater than that of the fire source in front of the bifurcation.Under a certain heat release rate,the critical wind velocity of the bifurcated tunnel was proportional to 1/3 power of the heat release rate.In this study,the critical velocity in the fire scene of the main tunnel with fire source behind the bifurcation point was about 1.5 times that of the fire source in front of the bifurcation point under the same heat release rate.The maximum temperature rise model of the ceiling was established when the ventilation rate was the critical velocity at different fire source positions in the bifurcated tunnel. |
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| Keywords: | bifurcated tunnel fire fire source position critical wind velocity temperature distribution |
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