Experimental and Numerical Study of Fire Suppression Performance of Ultral-Fine Water Mist in a Confined Space

Ultra-fine water mist (UFM) is a clean agent with a gas like property. Fire suppression experiemt was conducted in a confined space. Numerical simulation using DPM model and dense gas model were carried out to compare with experiment. Simulaition discovered that dense gas model is more suitable for predicting UFM transportation and flow behavior compared with DPM model. Both experiment and simulation found that fire of a larger size is easier to extinguish in a compartment space, which is because fire sources can promote transportation of UFM in a compartment. Fire location also affects the fire suppression performance by promoting or suppressing the transportation of UFM.