Particle‐gas dispersion effects in confined coaxial jets
1975; Wiley; Volume: 21; Issue: 2 Linguagem: Inglês
10.1002/aic.690210219
ISSN1547-5905
Autores Tópico(s)Cyclone Separators and Fluid Dynamics
ResumoAbstract The objective of this study was to determine the mixing characteristics of two‐phase, confined, coaxial jets. Gas composition, gas velocity, and particle mass flux radial profiles were obtained at different axial stations using 20% by weight of 6 or 30 μm spherical aluminum particles in the primary stream. Additional tests were conducted without particles. Radial profiles for gas composition, velocity, and particle flux were correlated using the principle of similarity. In the gas phase, mass mixed more rapidly than momentum, and the 6 μm particles mixed less rapidly than mass or momentum. Systems with low primary density and low secondary velocity mixed most rapidly. An implicit numerical model was developed to predict the rate of mixing of the gas/particle mixture. The model included coupled dynamic and thermal nonequilibrium effects between the gas and solid phases. Comparisons of model predictions and experimental results were good.
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