Formation of Liquid Spray in the Presence of Barrier Discharge

Abstract

The characteristics of water spray have been measured in the presence of dielectric barrier discharge in the region where the film of liquid flowing out of the nozzle hole disintegrates into droplets. The discharge has been initiated in the region between the water film and the high-voltage electrode surrounded by a dielectric material. The measurements were performed using the direct shadow method based on obtaining multiple shadow instantaneous microphotographs of droplets. Current and voltage oscillograms in the barrier discharge initiation circuit have been recorded. The average parameters, such as the average diameter and Sauter mean diameter, of droplets have been compared in two cases: without discharge initiation and when it has been created in the region where the spray is formed, at a voltage frequency of 5 kHz and its amplitude of 10 kV. It is shown that in the case of discharge initiation, the average parameters of droplets significantly decrease and their number increases.