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采用实验的方法并与理论分析相结合 ,对细水雾在扑灭B类火时 ,占主导地位的灭火机理进行了研究。实验中发现 ,当液体燃料的闪点相差较大时 ,其灭火机理往往不尽相同。并且当细水雾的雾特性相差较大时 ,在灭火中起主导作用的灭火机理常常也各有不同。因而那种单纯以雾滴的粒径分布作为细水雾扑灭各种类型火焰难易程度的标准不尽合理 ,在扑灭燃料闪点较高的油池火时 ,雾滴的动量分布对细水雾的灭火有效性影响更大。为此 ,本文还建立了一个简单的模型 ,试图得到在这种火灾场景下 ,对细水雾灭火的临界动量要求
Using experimental methods and combining with theoretical analysis, the fire extinguishing mechanism dominated by water mist in the extinguishing of Class B fire was studied. The experiment found that when the liquid fuel flash point difference is larger, the fire fighting mechanism is often different. And when the mist characteristics of water mist vary greatly, the fire fighting mechanisms that play a leading role in fire fighting are often different. Therefore, the simple particle size distribution of the droplet as a water mist extinguishes the difficulty of various types of flame standards are not reasonable, in the fight extinguishing fuel flashpoint higher pool fire, the droplet momentum distribution of fine water Fog fire effects more effective. To this end, this article also established a simple model, trying to get in this fire scenario, the critical momentum requirements for water mist fire extinguishing