摘要
综合管廊中电缆存在一定的火灾危险性,为研究高压细水雾对综合管廊的灭火效果,针对I型结构地下综合管廊,通过火灾数值模拟软件在综合管廊中开展不同粒径细水雾条件下灭火模拟,分析温度场、烟气流动以及能见度变化情况,对管廊内在相同火源功率下不同粒径细水雾灭火效能分析发现,选定的6种粒径细水雾中,200μm细水雾具有快速降温效果,50μm细水雾灭火效果最好,细水雾粒径越小对烟气层沉降的影响越显著。
The cables in the comprehensive pipe gallery have a certain fire risk.in order to study the fire extinguishing effect of high pressure water mist on comprehensive pipe gallery,through the fire numerical simulation software,the fire extinguishing simulation under the conditions of water mist with different particle sizes was carried out in the comprehensive pipe gallery to analyze the changes of temperature field,smoke flow and visibility.It is found that the fire extinguishing efficiency of water mist with different particle sizes under the same fire source power in the pipe gallery was analyzed,among the six kinds of water mist with particle size,200μm water mist has rapid cooling effect,and 50μm water mist has the best extinguishing effect.The smaller the particle size of water mist is,the more significant the influence of smoke layer settlement is.
作者
张华杰
梁天水
ZHANG Hua-jie;LIANG Tian-shui(School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, China)
出处
《科学技术与工程》
北大核心
2021年第32期14022-14027,共6页
Science Technology and Engineering
基金
国家自然科学基金(51874258)。
关键词
电缆
细水雾粒径
温度场
烟气流动
数值模拟
cable
water mist particle size
thermal field
smoke flow
numerical simulation
