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RESEARCH PAPERS: Gas Turbines: Combustion and Fuels

A Design Procedure for Effervescent Atomizers

[+] Author and Article Information
J. S. Chin, A. H. Lefebvre

Thermal Science and Propulsion Center, Purdue University, West Lafayette, In 47907

J. Eng. Gas Turbines Power 117(2), 266-271 (Apr 01, 1995) (6 pages) doi:10.1115/1.2814090 History: Received March 17, 1993; Online November 19, 2007

Abstract

A methodology for the design of effervescent atomizers is described. The objective is to achieve sprays of minimum mean drop size for any stipulated values of liquid flow rate, air supply pressure, and air/liquid ratio. Application of the method leads to optimum values for all the key atomizer dimensions, including the number and size of the air injection holes, and the diameters of the mixing chamber and discharge orifice. It also enables optimum dimensions to be determined for a convergent-divergent nozzle should such a device be fitted to the nozzle exit to improve atomization performance. Examples are provided to demonstrate the application of the recommended design procedure and to illustrate the relative importance of various flow and geometric parameters in regard to their effects on atomization quality.

Copyright © 1995 by The American Society of Mechanical Engineers
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