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 ›› 2023, Vol. 42 ›› Issue (3): 334-338.

• • 上一篇    下一篇

纵向通风作用下隧道内双火源火焰高度变化规律研究

王鹏飞1,张劲光2,王 栋3,周山新4,马雨轩4,陈龙飞4   

  1. (1.应急管理部天津消防研究所,天津 300381;2.国网河南省电力公司超高压公司,河南 郑州 450052;3.国网河南省电力科学研究院,河南 郑州 450052;4.西南交通大学 地球科学与环境工程学院,四川 成都 610031)
  • 出版日期:2023-03-15 发布日期:2023-03-15
  • 作者简介:王鹏飞(1987- ),男,应急管理部天津消防研究所助理研究员,博士,主要从事大尺度火行为燃烧致灾机制与防控技术研究,天津市南开区卫津南路110号,300381。
  • 基金资助:
    国家电网公司总部科技项目(5200-202024105A-0-0-00)

Study on flame height of double fire sources in tunnel under longitudinal ventilation

Wang Pengfei1, Zhang Jinguang2, Wang Dong3, Zhou Shanxin4, Ma Yuxuan4, Chen Longfei4   

  1. (1. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China; 2. State Gird Henan Electric Power Ultra-high Voltage Company, Henan Zhengzhou 450052, China; 3. State Gird Henan Electric Power Research, Henan Zhengzhou 450052, China; 4. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Sichuan Chengdu 610031, China)
  • Online:2023-03-15 Published:2023-03-15

摘要: 运用FDS数值模拟,建立了1∶5的缩尺隧道模型。通过理论分析,研究了纵向风速、火源间距、火源功率等参数对双火源火焰高度的影响。结果表明,火源热释放速率从60 kW增大到120 kW时,平均火焰高度与最大火焰高度增大;纵向风速从0.2 m/s增大到0.4 m/s时,平均火焰高度与最大火焰高度减小;双火源的间距从0 m增大到0.6 m时,平均火焰高度与最大火焰高度减小。考虑理查森数与纵向风速的影响,建立了双火源火源间距与融合火焰高度的无量纲预测模型。

关键词: 双火源, 火源间距, 纵向通风, 火焰高度

Abstract: Abstract: A 1/5 reduced-scale tunnel model is established using FDS numerical simulation. Through theoretical analysis, the influence of longitudinal ventilation velocity, fire source spacing and heat release rate of fire source on the flame height of double fire sources is studied. The results show that the average flame height and maximum flame height increase with the heat release rate increasing from 60 kW to 120 kW. And, the average flame height and maximum flame height decrease with the increase of longitudinal ventilation velocity (from 0.2 m/s to 0.4 m/s) or the increase of fire source spacing (from 0 m to 0.6 m). Considering the influence of Richardson's number and longitudinal ventilation velocity coefficient, this paper establishes the dimensionless prediction models for the relationship of the merged flame height of double fire sources and fire source spacing.

Key words: Key words: double fire sources, fire source spacing, longitudinal ventilation, flame height