某室内商业步行街火灾烟气控制研究

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...

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

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.