不同季节高大中庭火灾烟气上升高度分析  

Analysis of Rising Height of Fire Smoke in High Atrium in Different Seasons

作　　者：杨雅娟 陈静[2] YANG Yajuan;CHEN Jing(Chaoyang District Municipal Fire Brigade, Beijing 100013, China;China Academy of Building Research, Beijing 100013, China)

机构地区：[1]北京市朝阳区消防支队,北京100013 [2]中国建筑科学研究院,北京100013

出　　处：《消防技术与产品信息》2018年第5期26-30,共5页Fire Technique and Products Information

基　　金：中国建筑科学研究院青年基金项目"相互连通的多个高大中庭自然排烟关键技术研究"

摘　　要：采用理论计算和数值模拟方法,分析了不同季节、不同火灾功率下烟羽流上升高度,得出相应结论。火源功率越大,或室内温度梯度越小,则烟气上升高度越高。对于高大中庭,大部分火灾烟气无法上升至顶棚,应在不同高度上设置线型光束火灾探测器防止漏报,同时沿高度分层设置排烟设施,以排出无法上升至屋顶的烟气。Theoretical calculation and numerical simulation were used in this paper to analyze the rising height of the smoke plumeflow under different seasons and different fire heat release rates to obtain corresponding conclusions. With bigger fire heat release rate or smaller interior temperature gradient, the smoke flow rose higher. For a high and large atrium,most of the fire smoke cannot rise to the ceiling,so linear beam type smoke detector should be installed at different heights to prevent omitting alarm while smoke exhausting facilities should be installed stratifiedly to discharge smoke that cannot rise to the roof.

关 键 词：高大中庭 不同季节 热障效应 烟气高度 

分 类 号：X913.4[环境科学与工程—安全科学] TU972[建筑科学—建筑设计及理论]