消防泡沫在液体燃料上的铺展性能试验研究

摘 要：扑救易燃液体火灾往往存在扑救时间长、火情易反复的现象。根本原因在于缺乏泡沫对液体燃料火灾灭火过程的深入认识。泡沫在易燃液体表面的铺展可能是抑制火灾最重要的因素，研究泡沫灭火剂在燃油表面灭火过程中的铺展覆盖情况至关重要。选用3%AFFF、3%AFFF/AR和3%FP 3种灭火剂在矩形流道内研究了泡沫铺展性能。研究表明，由于3%AFFF和3%AFFF/AR在燃料表面的剪切应力较小，其铺展速度比3%FP较快。由于3%AFFF和3%AFFF/AR可以在溶剂油表面形成水膜，其铺展速度与在水表面相似。3%FP在溶剂油表面不能形成水膜，比在水表面铺展慢。

Experimental study on spreading performance of fire foam on liquid fuel

For the fire-fighting of liquid fires, the fire-fighting process often has the phenomenon of long fire-fighting time and repeated fire. The fundamental reason lies in the lack of in-depth study of foam on liquid fuel fire extinguishing process. The spread of foam on liquid surface is probably the most important factor to suppress the fire on liquid surface. It is of great significance to study the spread and coverage of foam extinguishing agent in the process of extinguishing fuel surface. In this paper, 3%AFFF, 3%AFFF/AR and 3%FP were selected to study the spreading performance of foam in rectangular channel.The results show that the spreading speed of 3% AFFF and 3% AFFF/AR is faster than that of 3% FP because the shear stress on the fuel surface is small. Because 3% AFFF and 3% AFFF/AR can form water film on the surface of solvent oil, their spreading speed is similar to that on the surface of water. 3% FP cannot form water film on the surface of solvent oil, which is slower to spread than that on the surface of water.