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 ›› 2021, Vol. 40 ›› Issue (9): 1269-1275.

• •    下一篇

液氮及排烟共同作用扑灭电缆火灾有效性研究

蓝美娟，冯涛，涂嘉庆，陶常法   

  1. 1. 浙江安防职业技术学院应急技术学院，浙江温州325016；2. 温州市消防救援支队，浙江温州325016；3. 合肥工业大学汽车与交通工程学院，安徽合肥230009
  • 出版日期:2021-09-15 发布日期:2021-09-15
  • 作者简介:蓝美娟（1988-），女，浙江衢州人，浙江安防职业技术学院讲师，硕士，主要从事建筑防火灭火及细水雾灭火机理研究，浙江省温州市瓯海区瓯海大道2555 号，325016
  • 基金资助:
    国家自然科学基金委民航联合研究基金（U1933131）；浙江省高等教育“十三五”教学改革研究项目立项课题（JG20191064）；温州市科技局基础项目（R2020030）

Study on the effectiveness of extinguishing cable fires under the combined action of liquid nitrogen and smoke

LAN Mei-juan1, FENG Tao2,TU Jia-qing1, TAO Chang-fa3   

  1. 1. Department of Emergency Technology, Zhejiang Collegeof Security Technology, Zhejiang Wenzhou 325016, China；2.Wenzhou Fire and Rescue Division, Zhejiang Wenzhou325016, China； 3. School of Automotive and Transportation Engineering,Hefei University of Technology, Anhui Hefei230009, China
  • Online:2021-09-15 Published:2021-09-15

摘要： 城市地下综合管廊电缆火灾危险性极大。运用FDS软件模拟液氮和机械排烟共同作用、仅有机械排烟以及无液氮和机械排烟3 种工况下，综合管廊内部电缆火灾蔓延情况。分析火灾发生后综合管廊内部烟气蔓延及温度分布，发现液氮和机械排烟的共同作用能迅速扑灭火灾从而减小由于发生火灾造成严重后果的危险程度。分析不同的注氮速度和机械排烟速度对扑灭综合 管廊电缆火灾的影响，发现适当增加注氮速度和排烟速度有利于扑灭电缆火灾。

关键词: 电缆火灾, 数值模拟, 液氮灭火, 机械排烟, 烟气蔓延, 温度场

Abstract: The cable fire risk of underground pipe gallery is extremely high. FDS software is used to simulate the flame spread of cable inside the underground pipe gallery under three conditions, namely, the combined action of liquid nitrogen and mechanical smoke exhaust, only mechanical smoke exhaust, and no liquid nitrogen or mechanical smoke exhaust. The smoke spread and temperature distribution in the underground pipe gallery after cable fire are analyzed. It is concluded that the combined action of liquid nitrogen and mechanical smoke exhaust can quickly extinguish the fire and reduce the risk of serious consequences caused by the cable fire. The effects of different nitrogen injection speeds and mechanical smoke exhaust speeds on extinguishing cable fires in the underground pipe gallery are analyzed, and it is concluded that an appropriate increase in nitrogen injection speed and smoke exhaust speed is beneficial to extinguishing cable fires.

Key words: cable fire;numerical simulation, liquid nitrogen fire extinguishing, mechanical smoke exhaust, smoke spread, temperature field