The experimental study of compressed air foam produced by 2-bromo-3,3,3-trifluoro-propene and air in suppression of 1 m2 n-pentane oil fire

In this paper, an experimental model of a 1 m 2 tank fire was constructed to investigate the coupling mechanism between 2-bromo-3,3,3-trifluoro-propene (BTP) and the compressed air foam system (CAFS), and to optimize the extinguishing performance of the combination of extinguishing agents by controlling the flow rate of BTP. The results demonstrated that the combination of compressed air foam (CAF) and BTP significantly enhances the foam's performance on low-boiling point flammable liquids. It is found that, in Test No.3, the fire control time of the aqueous film-forming foam (AFFF) and BTP was about two times higher than the extinguishing time of CAF with the same supply strength. In Test No.2, the fire control and extinguishing time of the alcohol-resistant aqueous film-forming foam (AFFF/AR) and BTP was about 20 % higher than that of CAF. After the formula was calculated, it gave the BTP gasification rates range from 0.26 to 0.73, and the volume share of BTP vapor ranges from 12.77 % to 53.77 %. And the BTP vapor percentage in the foam reaches a certain value, the physical and chemical extinguishing effects are coupled. The effectiveness of fire suppression is increased. This study offers a novel technical approach for the low-boiling point flammable liquid fires, carrying important implications for engineering applications.