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Performance characteristics of effervescent atomizer in different flow regimes

Ramamurthi, K and Sarkar, UK and Raghunandan, BN (2009) Performance characteristics of effervescent atomizer in different flow regimes. In: Atomization and Sprays, 19 (1). pp. 41-56.

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Official URL: http://www.begellhouse.com/download/articles/6c7ef...

Abstract

The characteristics of the two-phase flow and the spray formed in an effervescent atomizer were experimentally investigated over a range of flow rates, gas-to-liquid ratios (GLR), injection pressures, and discharge orifice diameters. The Reynolds number (Re), defined with the orifice diameter as the characteristic length, was seen to be a pertinent parameter in addition to GLR for determining the transition from the bubbly flow to slug flow. The discharge coefficient of the atomizer in the bubbly flow regime and the Sauter mean diameter of the spray in the annular flow regime were found to scale with the parameter ${GLR (Re)^{0.5}}$. The structure of the spray and the measured values of cone angle of the spray showed distinctly different features in the bubbly, slug, and annular flow regimes. A two-dimensional simulation of the flow and spray structure reproduced the gross features observed in the experiments.

Item Type: Journal Article
Additional Information: Copyright belongs to Begell House Inc, Online vertion is not available
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 25 Aug 2009 10:48
Last Modified: 25 Aug 2009 10:48
URI: http://eprints.iisc.ernet.in/id/eprint/16206

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