| 北京地铁4号线隧道火灾烟气控制的CFD模拟 |
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| 引用本文： | 杨晖,贾力,杨立新.北京地铁4号线隧道火灾烟气控制的CFD模拟[J].建筑科学,2009,25(8). |
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| 作者姓名： | 杨晖 贾力 杨立新 |
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| 作者单位： | 1. 北京建筑工程学院,环境与能源工程学院,北京,100044;北京交通大学,机电学院,动力系,北京,100044
2. 北京交通大学,机电学院,动力系,北京,100044 |
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| 基金项目： | 国家973项目，北京市"供热、供燃气、通风及空调工程"重点实验室开放课题 |
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| 摘 要： | 本文根据北京地铁4号线某段隧道的实际尺寸建立了几何模型,针对该模型利用CFD方法模拟了纵向通风对控制火灾烟气扩散的作用,研究了不同热源形状条件下临界通风速度与热释放率的关系,并将其与已有研究成果进行了对比.结果显示在热源形状不变时,临界通风速度与热释放率(HRR)和隧道宽度之比的1/3次方成正比,热羽流在临界通风速度下倾斜角为常数;当热源长度随热释放率成比例变化时,临界通风速度在高热释放率条件下呈现出稳定不变的趋势.研究表明在采用数值模拟方法进行隧道火灾通风设计时,热源条件的设置对模拟结果有显著影响.
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| 关 键 词： | 隧道火灾 纵向通风 临界通风流速 热释放率 数值模拟 |
CFD Simulation on Tunnel Fire Smoke Control in Beijing Metro the 4th Line |
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| YANG Hui,JIA Li,YANG Li-xin.CFD Simulation on Tunnel Fire Smoke Control in Beijing Metro the 4th Line[J].Building Science,2009,25(8). |
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| Authors: | YANG Hui JIA Li YANG Li-xin |
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| Affiliation: | 1;2;1.School of Environment and Energy Engineering;Beijing University of Civil Engineering and Architecture;Beijing 100044;China;2.Department of Power Engineering;School of Mechanical and Electronic Control Engineering;Beijing Jiaotong University;China |
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| Abstract: | In this paper,CFD method was applied to simulate the effectiveness of longitudinal ventilation on controlling the tunnel fire smoke diffusion with geometrical model,which was established based on certain section with actual size in Beijing metro the 4th line.The relationships between the critical ventilation velocity and the heat release rate(HRR) under different heat source conditions were studied,and then the results were compared with the other reported equations.It was presented that critical ventilatio... |
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