喷头布置间距对综合管廊电缆舱细水雾灭火效果影响研究  

Study on the influence of nozzle interval on the extinguishing performance of water mist system in the cable cabin of utility tunnel

作　　者：郭伟健 GUO Weijian(Fire and Rescue Department of Shijingshan District Beijing municipality,Beijing 100043,China)

机构地区：[1]北京市石景山区消防救援局,北京石景山100043

出　　处：《华北科技学院学报》2025年第2期78-82,共5页Journal of North China Institute of Science and Technology

摘　　要：为了研究城市综合管廊细水雾灭火系统关键参数设置及灭火效果,采用FDS软件建立了综合管廊电缆舱模型,分析了细水雾系统喷头布置间距的变化对灭火时间、烟气层高度和CO浓度的影响,确定了细水雾灭火系统的优化设计参数,从而为实际工程中细水雾灭火系统的设计和应用提供一定参考。研究结果表明:随着喷头间距增大,烟气层高度呈下降趋势,CO浓度先降低后升高,细水雾系统灭火时间先增加后减少;喷头间距为3m时,细水雾灭火效果最佳,灭火机理为窒息灭火。In order to study the key parameter and fire extinguishing performance of water mist system in urban utility tunnel,FDS software is used to establish the cable cabin model of a utility tunnel,and the influence of the change of the water mist nozzle interval on the fire extinguishing time,the height of the smoke layer and the concentration of CO is analyzed.Accordingly,the optimized design parameter of the water mist system is determined,so as to provide a reference for the water mist system design and application in the actual project.The results show that:with the increase of nozzle spacing,the smoke layer height tends to descend,the CO concentration first declines and then rises,while the fire extinguishing time first increases and then decreases.The best fire extinguishing performance of water mist system is achieved with nozzle interval of 3m,and the fire extinguishing mechanism is smothering.

关 键 词：综合管廊 电缆舱 细水雾系统 数值模拟 消防工程 

分 类 号：X932[环境科学与工程—安全科学]