Velocity and particleflux characteristics of turbulent particleladen jets
Abstract
The velocity and mass flux characteristics in the nonselfsimilar region of a round turbulent beadladen jet for three bead diameters (200, 80, and 40 microns), at two mass loadings, are described. The mean velocity of the 200micron beads is virtually constant, with little influence of mass loading on the mean motion of the beads because the mean Stokes number is small. The centerline velocity of the 80micron beads decays but not as a function of mass loading, at least up to 86 percent (mass/mass). For the 40micron beads, the rate of decay of the centerline bead velocity decreases with increasing mass loading. The rate of spreading of 40micron beads decreases with increasing loading, but the opposite is true for the 80micron beads. The 'fanspreading' model for the motion of the beads is considered, which refers to quasiunidirectional trajectories of the beads from the exit of the jet up to about 20 diameters downstream for the 40micron diameter beads, and farther for the larger beads.
 Publication:

Proceedings of the Royal Society of London Series A
 Pub Date:
 November 1989
 DOI:
 10.1098/rspa.1989.0117
 Bibcode:
 1989RSPSA.426...31H
 Keywords:

 Jet Flow;
 Particle Laden Jets;
 Turbulent Jets;
 Velocity Distribution;
 Atomizers;
 Jet Mixing Flow;
 Laser Doppler Velocimeters;
 Perturbation Theory;
 Phase Velocity;
 Vapor Phases;
 Fluid Mechanics and Heat Transfer