Experimental research on the spreading performance of fire extinguishing foam with different expansion

Abstract In this paper, the spreading properties of foam with different expansions were compared and analyzed, and the reasons were discussed by studying the archaeological properties of foam. The experiment shows that the viscosity and yield stress of foam increase with the increase of expansion ratio, which results in the slow spreading speed of foam on the fuel layer. In addition, the foam with the expansion ratio 6 can quickly form a “water film” due to its accelerated liquid separation process, and the spreading speed on the oil surface is significantly improved. This study provides theoretical support for the optimization and application of foam fire extinguishing technology.