Investigation of the Effect of Liquid Viscosity on the Primary Break Up Lengths and Droplet Diameter and Ligament Diameter and Instability of a Swirling Annular Liquid Sheet
A temporal stability analysis is carried out to model the atomization of a swirling viscous annular liquid sheet subject to axi-symmetric disturbances and inviscid swirling air streams. A linear instability analysis of an annular liquid sheet emanating from an atomizer subjected to inner and outer air streams to investigate the liquid viscosity and swirl velocity on the maximum growth rate has been carried out. The dimensionless dispersion equation that governs the instability is derived. The dispersion equation solved by Numerical method. The result show that viscosity has negative and swirl velocity has positive effect on maximum growth rate and its corresponding unstable wave number that it produces the finest droplets. At low liquid swirl Weber number, liquid swirl has a stabilizing effect on the sheet whereas at high liquid swirl Weber number, liquid swirl tends to destabilize the sheet.
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Document Type: Research Article
Publication date: June 1, 2014
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