摘要
针对目前设有通透性吊顶的商场市场中大量使用的上下喷式喷头设计形式,采用计算机数值模拟方法,建立实验模型,利用FDS 5.5对自动喷水灭火系统中上下喷式喷头设计的有效性进行验证。研究发现,在上下喷式喷头设计中,下层喷头的启动具有明显的条件限制,设置的下层喷头不能弥补通透性吊顶对降低直立型喷头布水范围、布水均匀性和喷水强度的影响,这种设计形式灭火成效不明显,不经济。
The upper and lower jet nozzles were widely used in the markets for grid ceiling.Experimental model was built and computed by FDS in order to verify the design reliability of upper and lower jet nozzles of automatic sprinkler systems for grid ceiling.Numerical simulation results showed that the lower sprinkler head was only activated under the obvious conditions.Water distribution range,water distribution uniformity and strength of water are not improved by the lower jet nozzles.Extinguishing effect of which is not obvious and economical.
出处
《消防科学与技术》
CAS
北大核心
2014年第2期174-177,共4页
Fire Science and Technology
关键词
通透性吊顶
火灾数值模拟
自动喷水灭火系统
上下喷式喷头
grid ceiling
large eddy simulation
automatic sprinkler systems
upper and lower sprinkler head design
