细水雾抑制气体火焰的实验测量

运用APV(Adaptive Phase／Doppler Velocimeter)系统、红外热成像方法和热电偶测温方法对细水雾和气体扩散火焰的作用过程中雾通量等雾场特性做了有效的测量，研究了细水雾和气体扩散火焰的作用过程。探索细水雾抑制扩散火焰的机理和规律。采用一种可以分离出细水雾灭火时不同机理相对贡献的实验方法，得到了比较理想的结论，用实验数据形象定量的表征出了在细水雾灭火时，水雾的蒸发潜热吸热作用、热容吸热作用以及稀释氧气作用对抑制气体扩散火焰所起的相对贡献。在实验条件下，讨论了细水雾各种灭火机理，合理解释了实验中出现的一些现象。实验研究表明，细水雾的各种灭火机理对于抑制火焰所发挥的作用不同，这对于细水雾灭火技术的发展很有意义。

Experimental Study on Extinguishing Gaseous Flame by Water Mist

The APV(Adaptive Phase/Doppler Velocimeter) system and Thermal Video System were used to measure water flux, parameters of the field of water mist and temperature. The process of water mist on gaseous diffusion flame is studied. That work successfully separates the effects of different fire suppression mechanisns of water mist according to an experimental method,that is oxygen dilution,specific heat and latent heat. The results are satisfied. The results showed that individual suppression mechanism of water mist contribute differently to the fire suppression. These results will be beneficial to the future study and development of water mist system.