Experiment on combustion and detonation characteristics and its suppression for liquid vapor

An apparatus for measuring explosion limit of combustible liquid vapor was designed. The explosion limits and detonation parameters, the least explosion suppressible concentration of RP-5 oil, RP-3 oil and alcohol air mixtures were measured respectively by using the apparatus and vertical detonation tube. The results indicate that the explosion limits and the least explosion suppressible concentration of the 1301 inert gas are (1.53~7.73)%, (0.82~7.17)% and (3.38~18.25)%, 6.75%, 6.8% and 5.56%, respectively, by volume, for RP-5 oil, RP-3 oil and alcohol air mixtures; the least explosion suppressible concentrations of N2, and CO2 are 49% and 45%, respectively, by volume, for RP-3 oil air mixtures. So the suppression effect of 1301 inert gas is better than CO2 and N2. The critical initiation energy, detonation velocity and pressure, the width of detonation wave cells are 2.11 MJ/m2, 1 609 m/s, 1 480 kPa, 14.5 mm, respectively, for alcohol-air mixture with equivalence ratio concentration.