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ICLASS 94
Proceedings of the Sixth International Conference on Liquid Atomization and Spray Systems

ISBN Print: 978-1-56700-019-1

ISBN Online: 978-1-56700-445-5

ENTRAINMENT BY EFFERVESCENT SPRAYS AT LOW MASS FLOW RATES

Abstract

A model of entrainment based on j et momentum flux that provides useful results at moderate values of GLR is presented An entrainment number of approximately 0.15, obtained for air and a 0.040 Pa-s hydrocarbon oil, provides a good estimate of entrainment by an effervescent spray as a function of axial distance, liquid mass flow rate, liquid, atomizing gas and entrained air densities, and nozzle gas-to-liquid ratio when using Ishii's slip ratio correlation. The results also indicate that substantial inaccuracies arise when attempting to extend Ishii's expression to fluids with viscosities of 0.100 Pa-s, thus illustrating that a correct value of slip ratio is necessary if accurate predictions are to be obtained.
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