森林燃烧中的特殊火行为研究进展

Special Fire Behaviors in Forest Burning

在森林火灾中,当火强度达到一定程度时,具有特殊的火行为现象。森林燃烧中的特殊火行为研究是国内外研究难点和重点之一,特殊火行为的特征有:火强度急剧增加、可持续的火蔓延速度很快、空气对流十分容易、远距离飞火、火旋风或大片的水平火焰、风突然平静。特殊火行为的现象有火旋风、对流柱、飞火和火爆等。当火表现出以上这些特征和现象时,它的强度就已经达到了常规的扑灭方法进行扑救很少有效的程度。在这种情况下,扑救工作要在那些能够保证安全工作的部分火线上进行,采取措施去保护宝贵的财产或资源。

havior will In the forest fire, when the intensity of fire becomes highonough, some special fire beoccur. The characteristic of the special fire behavior includes： The intensity of fire increases sharply; the sustainable fire spreads very fire whirlwind or large stretch of horizontal flame ; fast; the air convection is very easy; spot fires; the wind was suddenly calm. When the fire demonstrates the above characteristics, its intensity has already reached the routine method of putting out with little effectiveness. In this case, the fire fighting should go on the fire line safety, and take measures to protect valuable property or resource.