为了进一步提升细水雾灭火效果，通过数值仿真和实验相结合的方式研究细水雾喷雾在存在闪沸效应下的雾化特性和液滴尺寸特性。结果表明：初始状态水热焓越高，闪沸程度越高，喷出喷口后对周围小液滴的二次破碎效果更加剧烈，可使雾流冲击距离减小且径向范围扩大。当闪沸比例达到近30%时可获得更加均匀分布且Dv90达到十微米级的小雾滴，能够实现更好的雾化效果，可以显著增强灭火效果。可见，利用闪沸激发的细水雾系统可达到良好的雾化效果。

In order to further improve the effect of water mist fire extinguishing system, the atomization characteristics and droplet size characteristics of fine water mist under the presence of flash boiling effect were studied by combining numerical simulation and experiment. The results show that the higher the initial enthalpy of water, the higher the degree of flash boiling, the more severe the secondary crushing effect on the surrounding small droplets after ejecting nozzle, which can reduce the distance of fog flow and expand the radial range. When the flash boiling ratio reaches nearly 30%, more evenly distributed droplets can be obtained, and 90% of the droplets reach the ten micron level, which can achieve a better atomization effect and significantly enhance the fire extinguishing effect. It is concluded that the water mist system using flash boiling excitation can achieve preferable atomization effect.