Influence of Compressed Air Foam Extinguishing System on The Performance of Aqueous Film-Forming Foam Extinguishing Agent

According to the national standard, the relationship between the expansion, the drainage time and the gas-liquid ratio of the water-formed film foam extinguishing agent under different mixture ratio was investigated experimentally by using the gas-liquid two-phase foam gun. The results show that with the increase of gas-liquid ratio, the foaming multiple of water-formed foam first increases rapidly and then tends to a stable value. 25% drainage time first increases and then decreases and finally tends to a stable value. With the increase of mixture ratio, the expansion and 25% drainage time of the water-formed film foam extinguishing agent all increase, which has a significant effect on its performance.