某室内商业步行街火灾烟气控制研究  

Study on fire smoke spread characteristics of an indoor commercial pedestrian street

作　　者：胡浪 陈健 王海燕[1] 张丙森 HU Lang;CHEN Jian;WANG Hai-Yan;ZHANG Bing-Sen(China University of Mining and Technology(Beijing),Beijing 100083,China;Institute of Building Fire Protection,China Academy of Building Research,Beijing 100013,China)

机构地区：[1]中国矿业大学(北京),北京100083 [2]中国建筑科学研究院有限公司建筑防火研究所,北京100013

出　　处：《消防科学与技术》2022年第3期334-338,共5页Fire Science and Technology

基　　金：福建省科技计划项目(2019Y3002)。

摘　　要：为了研究室内商业步行街的火灾烟气控制效果,以某城市综合体为例,模拟室内商业步行街火灾,在中庭位置设置1.5 MW酒精火源,点火后分别联动开启排烟设施和手动开启自然排烟设施,观察两种工况下室内步行街内烟气蔓延情况,并测量试验区域温度等参数。试验发现,相较于顶部自然排烟,采用联动机械排烟的烟气沉降速率低17%,烟气层高度高11%,烟气羽流内温度场基本一致,平均温度为61℃左右,顶部烟气层温度高4.7%,且烟气在风机抽吸作用下,水平方向蔓延速率快41.6%。In order to study the fire smoke control effect of indoor commercial pedestrian street, taking an urban complex as an example, simulate the fire of indoor commercial pedestrian street, set a 1.5 MW alcohol fire source in the atrium, start the smoke exhaust facilities and manually start the natural smoke exhaust facilities respectively after ignition, observe the smoke spread in the indoor pedestrian street under two working conditions, and measure the temperature and other parameters in the test area. It was found that compared with the natural smoke exhaust at the top, under the mechanical smoke exhaust condition,the smoke settlement rate is 17% lower, the height of the smoke layer is 11% higher, the temperature field in the smoke plume is basically the same, the average temperature is about 61 ℃, the temperature of the top smoke layer is 4.7% higher, and the horizontal spread rate of the smoke is 41.6% faster under the suction of the fan.

关 键 词：室内步行街 热烟试验 机械排烟 自然排烟 

分 类 号：X913.4[环境科学与工程—安全科学] TU998.2[建筑科学—市政工程]