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

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (7): 944-949.

• • 上一篇    下一篇

风速和火源位置对L形综合管廊电缆舱室火灾蔓延特性影响

刘杰1, 应迪1, 李秋平1, 张冉2   

  1. （1. 青岛理工大学 机械与汽车工程学院，山东 青岛 266520；2. 中国矿业大学 安全工程学院，江苏 徐州 221116）
  • 出版日期:2023-07-15 发布日期:2023-07-15
  • 作者简介:刘 杰(1986— )，男，山东邹平人，青岛理工大学副教授，博士，主要从事煤矿瓦斯灾害治理和综合管廊火灾治理方面的研究，山东省青岛市黄岛区嘉陵江路777号，266520。
  • 基金资助:
    基金项目：国家自然科学基金项目(51904228)

Influence of wind speed and fire source location on the fire spread characteristics of L⁃shaped comprehensive pipe gallery

Liu Jie1, Ying Di1, Li Qiuping1, Zhang Ran2   

  1. (1. School of Mechanical and Automotive Engineering, Qingdao University of Technology,Shandong Qingdao 266520, China;2. School of Safety Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116,China)
  • Online:2023-07-15 Published:2023-07-15

摘要： 为了探究综合管廊内电缆火蔓延的影响因素，对L形综合管廊电缆舱进行数值模拟，研究在不同风速和单/双侧起火情况下的电缆火蔓延速度和管廊内温度变化。研究发现，纵向通风风速增加和双侧起火对管廊内电缆火蔓延速度起促进作用；当管廊内部单侧起火，纵向通风风速不大于0.2 m/s时，通风会促进火焰燃烧，提高管廊内部温度。纵向通风风速大于0.2 m/s时，从外界带来的冷空气对管廊内部温度起降温作用。当管廊内部双侧起火，风速对管廊内部温度影响界限由0.2 m/s增加为0.4 m/s，即风速不大于0.4 m/s时，通风会提高管廊内温度，风速大于0.4 m/s时，通风会降低管廊内温度。

关键词:

utility tunnel, cable fire, wind speed, fire on both sides, spreading speed

Abstract: In order to explore the influencing factors of cable fire spread in the comprehensive pipe gallery, the cable cabin in the L?shaped utility tunnel was numerically simulated to study the cable fire spread speed and temperature change in the utility tunnel under different wind speeds and single/double side fires. It is found that the increase of longitudinal ventilation wind speed and bilateral fires promote the spread speed of cable fire in the utility tunnel. When the utility tunnel is on fire on one side and the longitudinal ventilation wind speed is no more than 0.2 m/s, the flame combustion will be promoted, thus increasing the internal temperature of the utility tunnel. When the longitudinal ventilation wind speed is more than 0.2 m/s, the cold air brought from outside will cool the internal temperature of the utility tunnel; When there is a fire on both sides of the utility tunnel, the impact limit of wind speed on the internal temperature of the utility tunnel changes from 0.2 m/s to 0.4 m/s, that is, when the wind speed is no more than 0.4 m/s, the temperature in the pipe gallery will be increased; when the wind speed is more than 0.4 m/s, the temperature in the utility tunnel will be reduced.

Key words: utility tunnel, cable fire, wind speed, fire on both sides, spreading speed