| 隧道纵坡对烟气逆流层长度的影响研究 |
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| 引用本文： | 张楚旋,易冬福,彭怀德.隧道纵坡对烟气逆流层长度的影响研究[J].南华大学学报(自然科学版),2019,33(5):24-29. |
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| 作者姓名： | 张楚旋 易冬福 彭怀德 |
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| 作者单位： | 南华大学 资源环境与安全工程学院,湖南 衡阳 421001,娄底职业技术学院 安全培训与技术服务中心,湖南 娄底 417000,南华大学 资源环境与安全工程学院,湖南 衡阳 421001 |
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| 基金项目： | 湖南省教育厅一般项目(17C1375);湖南省核燃料循环技术与装备协同创新中心开放基金项目(2019KFQ02) |
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| 摘 要： | 基于纵坡坡度对隧道火灾烟气逆流层长度影响的重要性,本文以某实际隧道工程为研究对象,借助FDS5.0软件对不同坡度时该隧道火灾烟气逆流层长度进行数值模拟研究。从其他文献中总结出烟气逆流层长度随坡度和通风风速变化的规律。根据数值模拟数据分析拟合出新的坡度隧道临界风速的坡度修正公式,该公式完全满足关于逆流层长度受纵坡影响的规律,并较已知经验公式更好地与试验数据相符合,能更好地指导设计人员对隧道纵坡的选取。
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| 关 键 词： | 隧道火灾 隧道坡度 数值模拟 经验公式 逆流层长度 |
| 收稿时间： | 2019/4/8 0:00:00 |
Study of Influence on the Smoke Backflow Distances with Different Longitudinal Gradient in Tunnels |
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| ZHANG Chuxuan,YI Dongfu and PENG Huaide.Study of Influence on the Smoke Backflow Distances with Different Longitudinal Gradient in Tunnels[J].Journal of Nanhua University:Science and Technology,2019,33(5):24-29. |
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| Authors: | ZHANG Chuxuan YI Dongfu and PENG Huaide |
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| Institution: | School of Resource & Environment and Safety Engineering,University of South China, Hengyang,Hunan 421001,China,Safety Training & Technical Service Center, Loudi Vocational and Technical College,Loudi,Hunan 417000,China and School of Resource & Environment and Safety Engineering,University of South China, Hengyang,Hunan 421001,China |
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| Abstract: | Based on the importance of longitudinal slope gradient on length of smoke backflow distances in tunnel fire,one tunnel was taken as the research object in this paper.Through the software FDS5.0,the numerical analysis of smoke backflow distances,produced by fire hazard in tunnels with different slopes,was conducted.The variation laws of smoke backflow distances and ventilation speed were concluded by referring other references,after which a new slope correction formula of gradient tunnel with critical ventilation speed was obtained by numerical simulation and data analysis.It is revealed that the formula is in line with the law that the distance of backflow is affected by the longitudinal gradient.Further,compared with empirical formulas,it conforms to experimental data better.Therefore,this formula is capable of guidance in selecting longitudinal gradient of tunnels in design. |
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| Keywords: | tunnel fire the tunnel slopes numerical simulation empirical formula smoke backflow distances |
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