| 室外空气对地铁隧道烟气返流长度的影响 |
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| 引用本文： | 王海涛,李彬,曹荟娟,冯道广. 室外空气对地铁隧道烟气返流长度的影响[J]. 消防科学与技术, 2020, 39(6): 768-771 |
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| 作者姓名： | 王海涛 李彬 曹荟娟 冯道广 |
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| 作者单位： | （河南工业大学 土木工程学院，河南 郑州 450001） |
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| 基金项目： | 河南省科技攻关项目（192102310229） |
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| 摘 要： | 在真实地铁隧道内开展热烟试验，验证 FDS 模拟结果的正确性。建立地铁隧道三维物理模型，采用 FDS 研究室外空气设计参数对隧道火灾烟气返流长度和临界风速的影响。研究结果表明，室外空气设计参数对烟气返流长度和临界风速有较大的影响。室外空气温度越低，地铁隧道火灾烟气返流长度越长。室外空气湿度越大，地铁隧道火灾烟气返流长度越短。室外大气压力越大，地铁隧道火灾烟气返流长度越短。
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| 关 键 词： | 室外空气 空气温度 气压 空气湿度 烟气返流 返流长度 临界风速 |
| 收稿时间： | 2020-01-22 |
Effects of outdoor air on smoke back-layering length in subway tunnel |
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| WANG Hai-tao,LI Bin,CAO Hui-juan,FENG Dao-guang. Effects of outdoor air on smoke back-layering length in subway tunnel[J]. Fire Science and Technology, 2020, 39(6): 768-771 |
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| Authors: | WANG Hai-tao LI Bin CAO Hui-juan FENG Dao-guang |
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| Affiliation: | (College of Civil Engineering, Henan University of Technology, Henan Zhengzhou 450001, China) |
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| Abstract: | A hot smoke test was carried out in a real subway tunnel to verify the validity of FDS simulation results. Three- dimension model of subway tunnel was established and effects of outdoor air design parameters on smoke back- layering length and critical velocity were investigated by FDS. Results of study showed that outdoor air design parameters have important influences on smoke back-layering length in subway tunnel fires. The smoke back-layering is longer when the design temperature of outdoor air is lower. The smoke back-layering is shorter when outdoor air design humidity is bigger. The smoke back- layering is shorter when outdoor atmospheric pressure is bigger. |
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| Keywords: | outdoor air air temperature atmospheric pressure air humidity smoke back- layering flow back- layering length critical velocity |
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