Abstract

Paper presents the rheological characteristics of glycerol aqueous solutions and spray structures, droplets diameters, drop size histograms for effervescent atomizers. The study shows a nonlinear relation between the Sauter mean diameter and the gas to liquid mass flow ratio. By increasing the concentration of glycerol the solution viscosity tends also to increase. The experimental results show that the size of droplets depends on the liquid viscosity. The diameter of droplets increases with increase of liquid viscosity. Drops size histograms based on the number of drops showed the increase in number of large and the decrease in small droplets with increase of concentration of glycerol. Additionally, the characteristic stages of atomized liquid have been presented: the jet with built-in bubbles (slug flow), satellite bubbles and connected bubbles.