细水雾在城市地下综合管廊内灭火特性的数值模拟研究  

Numerical simulation on extinguishing effect of water mist system in urban underground utility tunnel

作　　者：孙瑞雪 姚斌 SUN Ruixue;YAO Bin(State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026, China)

机构地区：[1]中国科学技术大学火灾科学国家重点实验室

出　　处：《火灾科学》2019年第1期28-34,共7页Fire Safety Science

摘　　要：近年来,综合管廊逐渐成为城市建设热点,选择合理的灭火系统有利于保障消防安全,但相应的规范中未明确具体的设置参数。因此以某城市综合管廊为研究对象,采用FDS数值模拟软件,研究了管廊通风、雾滴粒径、喷雾流量等因素对细水雾灭火特性的影响,研究结果表明:将细水雾灭火系统与通风系统联动关闭通风可以提升细水雾的灭火效果;在此研究条件下,平均粒径为300μm、喷雾流量为13L/min的细水雾灭火效果较优。Utility tunnel has gradually become urban construction hotspot in recent years. However, for utility tunnel, the parameters for choosing reasonable fire extinguishing systems are not specified in the codes. In this paper, FDS is used to examine the influence of parameters of ventilation, water mist particle diameter and the spray flow rate on the extinguishing effect of water mist system in the urban underground utility tunnel.The results indicate that combined use of the water mist system and the ventilation system to block the ventilation can improve the fire extinguishing ability of the water mist. Under the conditions of this paper, a mean water mist particle diameter of 300 μm and a spray flow rate of 13 L/min have good effect in fire extinguishing.

关 键 词：城市综合管廊 细水雾灭火系统 数值模拟 灭火特性 

分 类 号：X932[环境科学与工程—安全科学]