Velocity and Vorticity Measurements in Round Jets with Side-Jets Formation Using a PIV

Abstract

Side jets are radial ejections of the jet fluid in the initial region and enhance the mixing between the jet and the ambient fluids. Helium gas and air were vertically discharged from a round nozzle into the still air. The velocity and vorticity fields in the initial region of the helium gas and air jets with side-jets formation were measured using a PIV in order to investigate a relationship between the process of side-jet formation and the vortex structures.