【摘要】 当室内火灾发展到轰燃时 ,房间温度急剧升高 ,室内所有可燃物表面都发生燃烧 ,从而造成严重的建筑破坏、财产损失和人员伤亡。研究了汽油作为燃料的情况下 ,在其中加不同量的沙子 ,对室内火灾温度的抑制作用。通过假设沙面下方存在着一定厚度的过渡层 ,对火源的燃烧过程进行简化处理 ,发现腔室上层热烟气温度到达峰值的时间、峰值大小和熄火速率都与火源的含沙量有明显的依赖关系。实验数据显示 ,这种理论分析是合理的更多还原

【Abstract】 When compartment fire reaches flashover, the temperature rises rapidly, resulting in the ignition of all surfaces of the combustibles within the compartment. In this paper, the suppression method of adding sand into the fire source (gasoline) is discussed. Through assuminga transition layer below the surface of sand, the combustion process of the fire source can be simplified. It is found that the time to the peak value of the upper layer temperature, the peak value itself and the rate of extinguishment have obvious dependence on the volume ratio of sand to the fire source(gasoline). Experimental results show that the theoretical analy is reasonable. [更多还原