Numerical Simulation of Ultra-fine Water Mist Extinguishing Mechanism

Ultra-fine water mist (UMF) had good performance in extinguishing fire caused by electric or flammable liquid.This paper studied the extinguishing effect of UMF in total flooding experiment in confined space,and used FDS fire dynamics simulation software to simulate the entire process in order to explore the extinguishing mechanism of UMF.The simulation results showed that UMF could not only cooling the fire rapidly but also isolate the fire from oxygen to cause suffocation which was the main reason for extinguishment because of its characteristics.