主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

消防科学与技术 ›› 2020, Vol. 39 ›› Issue (6): 768-771.

• • 上一篇    下一篇

室外空气对地铁隧道烟气返流长度的影响

王海涛,李彬,曹荟娟,冯道广   

  1. (河南工业大学 土木工程学院,河南 郑州 450001)
  • 收稿日期:2020-01-22 出版日期:2020-06-15 发布日期:2020-06-15
  • 作者简介:王海涛(1979-),男,山东菏泽人,河南工业大学土木建筑学院副教授,博士,主要从事隧道通风、消防安全工程和暖通空调研究,河南省郑州市高新区莲花街100 号,450001。
  • 基金资助:
    河南省科技攻关项目(192102310229)

Effects of outdoor air on smoke back-layering length in subway tunnel

WANG Hai-tao, LI Bin, CAO Hui-juan, FENG Dao-guang   

  1. (College of Civil Engineering, Henan University of Technology, Henan Zhengzhou 450001, China)
  • Received:2020-01-22 Online:2020-06-15 Published:2020-06-15

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。

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

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.

Key words: outdoor air, air temperature, atmospheric pressure, air humidity, smoke back- layering flow, back- layering length, critical velocity

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