Factors Influencing the Effective Spray Cone Angle of Pressure-Swirl Atomizers

[+] Author and Article Information
S. K. Chen, A. H. Lefebvre

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

J. Rollbuhler

NASA-Lewis Research Center, Cleveland, OH 44135

J. Eng. Gas Turbines Power 114(1), 97-103 (Jan 01, 1992) (7 pages) doi:10.1115/1.2906313 History: Received December 01, 1990; Online April 24, 2008


The spray cone angles produced by several simplex pressure-swirl nozzles are examined using three liquids whose viscosities range from 0.001 to 0.012 kg/ms (1 to 12 cp). Measurements of both the visible spray cone angle and the effective spray cone angle are carried out over wide ranges of injection pressure and for five different values of the discharge orifice length/diameter ratio. The influence of the number of swirl chamber feed slots on spray cone angle is also examined. The results show that the spray cone angle widens with increase in injection pressure but is reduced by increases in liquid viscosity and/or discharge orifice length/diameter ratio. Variation in the number of swirl chamber feed slots between one and three has little effect on the effective spray cone angle.

Copyright © 1992 by The American Society of Mechanical Engineers
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