水喷淋对建筑外立面火灾烟气向室内蔓延控制的研究

高层建筑外保温材料发生火灾后,研究着火层房间内的自动喷水灭火系统对火灾烟气向室内蔓延的控制效果,为高层建筑性能化防火设计提供理论支持。运用火灾动力学软件FDS模拟高层建筑外保温材料火灾,对比分析在不同喷射位置的自动喷水灭火系统作用下的室内平均CO浓度和温度等烟气特性参数。综合比较发现,将喷头置于窗上方向下喷淋能有效地降低室内平均CO浓度和平均温度。对于由高层建筑外保温材料引起的火灾,室内自动喷水灭火系统喷头相对于窗户的位置决定其对火灾烟气蔓延控制的效果。

On the Controlling Smoke Spreading into an Interior Room by a Sprinkler System in High-rise Building External Thermal Insulation Material Fires

The effect of smoke control,which was designed to prevent smoke spreading into an interior room by a sprinkler system in high-rise building external thermal insulation material fires,was studied. The results can be provided as a theoretical support for a performance-based fire design. Fire Dynamics Simulator was used to simulate the high-rise building external thermal insulation material fires and the smoke parameters such as average carbon monoxide concentration inside the room under sprinkler systems with different nozzle positions were compared and analyzed. The average CO concentration and average temperature could be effectively reduced when the sprinkler nozzle was placed on the top of window through a comprehensive comparison. For the high-rise building fires caused by insulation materials,the effect of smoke control by sprinkler system was determined by the spray nozzle position relative to the window.