During fuel dispersion of fuel air explosive, the fuel may be ignited or deflagrated, which significantly decreases energy output of the fuel air explosive. In this paper, numerical simulation and experiments are carried out to obtain the temporal and spatial distribution of deflagration gaseous products, fuel and air to investigate factors related to fire phenomenon in the initial stage of fuel dispersion. The results show that the amount of deflagration gaseous products is the main factor influencing the fire phenomenon in the initial stage of fuel dispersion. For the liquid-solid fuel formula, the optimal fuel-to-explosive mass ratio is in the range of 0.95%~1.7%.

fuel  /  disperse  /  fire