Open AccessA Design Procedure for Effervescent Atomizers
Author(s) -
J. S. Chin,
A. H. Lefebvre
Publication year - 1993
Language(s) - English
Resource type - Conference proceedings
DOI - 10.1115/93-gt-337
Subject(s) - body orifice , nozzle , pressure drop , volumetric flow rate , mechanics , materials science , drop (telecommunication) , flow (mathematics) , mechanical engineering , engineering , physics
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 geometrical parameters in regard to their effects on atomization quality.