中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (3): 37-41.doi: 10.16265/j.cnki.issn1003-3033.2017.03.007

• 安全工程技术科学 • 上一篇    下一篇

水雾强化隧道火灾火焰现象试验研究

李涛1,2 工程师, 谢玮2, 张玉春2 副教授, 肖晗3   

  1. 1 西南交通大学 交通运输与物流学院,四川 成都 610031
    2 西南交通大学 地球科学与环境工程学院,四川 成都 610031
    3 华中农业大学 园艺林学学院,湖北 武汉 430070
  • 收稿日期:2016-11-30 修回日期:2017-01-15 发布日期:2020-11-22
  • 作者简介:李 涛 (1983—), 男,陕西高陵人,在职博士研究生,工程师,主要从事建筑防火、地下交通设施防灭火技术及人员疏散方面的教学和科研工作。E-mail:taoli@swjtu.edu.cn。
  • 基金资助:
    国家自然科学基金资助(51008251,51578464)。

Experimental study on flame strengthening with water mist in tunnel fires

LI Tao1,2, XIE Wei2, ZHANG Yuchun2, XIAO Han3   

  1. 1 School of Transportation & Logistics, Southwest Jiaotong University,Chengdu Sichuan 610031,China
    2 School of Geosciences & Environmental Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031,China
    3 School of Horticulture & Forestry Sciences, Huazhong Agricultural University,Wuhan Hubei 430070,China
  • Received:2016-11-30 Revised:2017-01-15 Published:2020-11-22

摘要: 为探明隧道内水雾对柴油池火的火焰强化作用机制,基于Froude准则,搭建比例为1∶10的隧道水雾灭火试验平台。用模型试验方法,定量分析喷嘴压力与预燃时间等因素对水雾的火焰强化效果的影响。试验结果表明,火焰强化现象产生的主要原因是水雾和燃料的扬沸,只有当喷嘴压力超过某一临界值时才会出现火焰强化现象;强化后的火焰宽度及面积较无强化火焰明显增大,火焰高度略有降低;水雾对火焰的强化作用可以分为瞬间弱度、间断中度和连续强度3种程度,随着预燃时间的增加,火焰强化程度不断升高,火灾危险性逐渐变大。

关键词: 隧道火灾; 模型试验; 水雾; 火焰强化; Froude准则

Abstract: To discuss flame strengthening effect caused by water-mist in diesel pool fire, a 1∶10 water-mist fire fighting experiment platform was established based on Froude rule. By means of small scale model effects of, quantitatively factors,like nozzle pressure and pre-combustion time, on the flame strengthening caused by water-mist were studied. The results show that the main reason for flame strengthening phenomenon is boiling of both the water-mist and the fuel, only when nozzle pressure surpasses a critical value, there will arise the flame strengthening phenomenon,that the flame width and area increase obviously after strengthening effect, while the flame height has a slight decrease,and that the water-mist has three different strengthening effects on flame, which are divided into fast-weak strengthening, discontinuous-moderate strengthening and continuous-intense strengthening, and increasing pre-combustion time promotes, the flame strengthening degree gradually , and makes the fire hazard greater.

Key words: tunnel fire, model experiment, water-mist, flame strengthening effect, Froude rule

中图分类号: