IL08 NEW UNDERSTANDING OF THE INFLUENCE OF STOKES NUMBER ON PARTICLE-LADEN JETS FROM SIMULTANEOUS PLANAR MEASUREMENTS OF NUMBER DENSITY AND VELOCITY

Abstract

The influence of Stokes number on the evolution of the distributions of particle concentration and velocity from their exit values is reported for a co-flowing jet issuing from a long pipe. The data are obtained by simultaneous Planar Nephelometry and Particle Image Velocimetry using four cameras to provide high resolution through the first 30 jet diameters and also correction for optical attenuation. These data provide much more detailed information than is available from previous measurements. These provide new understanding of how the Stokes number influences the flow at the jet exit plane and how this influence propagates throughout the jet.