多层建筑火灾烟气运动的模拟实验研究

火灾烟气是导致多层建筑火灾中人员伤亡的主要原因。结合多层建筑的实际情况 ,利用缩尺度模型实验楼模拟多层建筑火灾的典型情况 ,对其火灾烟气自火源产生后的运动特性进行实验研究。结果表明 ,烟气沿程由于热交换温度不断降低 ,会迅速达到顶部楼层并立即沉降 ,而且不同工况条件下所包含的有毒成分浓度随着火源温度的升高而上升。实验结果的分析能够较好地符合实际火灾的一些典型调查结果。

Simulative Experimental Studies of Fire Smoke Flow in Multi-floor Buildings

Fire smoke is an important causation resulted in many casualties in the fire of multi-floor buildings. Typical cases were simulated as multi-floor building fires by a reduced-scale experimental storied building model and the characteristics of fire smoke flow from fire source were studied by groups of experiments referring to actual environment. The results indicates that smoke temperature lowers continuously due to heat exchange, but smoke could rise to upper storey rapidly and sediment quickly, furthermore, the concentrations of toxic components of different cases involved could increase with the temperature of fire source increase. Analysis shows that the results comply well with the investigated findings of real fire.