The experimental study of transient droplets particle size and concentrationin confined spaces

In order to study the influence of droplets particle size and concentration on the explosion parameters of the gas-liquid two-phase mist, the total light scattering detection system is established based on confined space. The water is used as the liquid medium in this experiment. The Sauter mean diameter D₃₂, droplets particle size distribution and concentration are measured in the 20 L vessel. Two sets D₃₂ (31.24 μm, 46.09 μm), droplets particle size distribution and various concentration of water/air mixtures are obtained through various mixture ration tests of pneumatic pressure and liquid dose. The results indicate that there is a linear relationship between the spray dose concentration and actual measuring concentration in the two sets of D₃₂. Furthermore, the D₃₂ of the flammable liquid in the turbulent air under the same condition is concluded by the fragment theory, and a new experimental method is proposed for the explosion parameters of the gas-liquid two-phase fuel/air mixtures.