室内火灾旋转火焰影响因素试验研究

在小尺寸试验中重现了火灾火焰的旋转现象,并在没有外部鼓风的情况下,实现了旋转火焰自发产生。对室内火灾的旋转火焰现象进行了描述,得出旋转火焰具有自旋、根部变细、焰柱增长和旋转中心飘移等特征。并进一步分析了房间结构变化对室内火灾旋转火焰火灾危险性的影响,得出随着燃烧池面积的增大、门宽的减小及门高的降低,旋转火焰均呈增强趋势,而随着顶棚开口面积的增大,旋转火焰先增大后减小。

Experimental Studies of the Influencing Factors of Whirling Flames in Enclosure Fires

The rotations of flames are reproduced in the small- scale experiments in this paper,and the whirling flames are produced spontaneously without outer blast. The phenomena of whirling flames in enclosure fires are described in this study. The periodic formation,the rotation,the core deviation and destruction of whirling flames have been observed,and the characteristics such as rotation,thinner root,longer flame and core deviation are obtained.The parameters of whirling flames in enclosure fires are studied by changing conditions of the room in this paper.