油池火中细水雾强化火焰现象的研究

细水雾与油池火相互作用之初往往会使燃烧剧烈，强化火焰。实验研究与理论分析表明，雾滴在可燃物表面蒸发是造成这种现象的主要原因。通过改变燃料种类、喷头雾特性参数等实验工况发现火焰强化程度主要决定于燃料的挥发性以及雾滴的直径、速度等参数。而在油盆中加水后燃料表面温度降低、火焰功率下降，火焰强化现象随着加水量的增加而逐渐弱化乃至消失，细水雾系统的灭火时间也明显缩短。

Investigation of Fire Enhancement in Pool Fire by Water Mist

In the process of water mist fire suppression the phenomenon of fire expansion may be found initially. Experiments and theoretic study show that evaporation of mist on the surface of fuel plays a crucial role in the fire expansion. In experiments of varied conditions, it is found that volatility of fuel and characteristics of water mist determine the degree of fire intensification. It is found that water in the bottom of tray will make fuel surface temperature and fire heat release rate descend. And with increase of water quantity, fire intensification will be weakened, extinguishing time also be shortened. So further research on change of fire heat release rate owing to water pouring is necessary to ensure the reliability of experiment data.