Liquid Sheet Disintegration and Atomization Process on a Simplified Airblast Atomizer

[+] Author and Article Information
G. Lavergne, P. Trichet, P. Hebrard, Y. Biscos

CERT/ONERA/DERMES, 31055 Toulouse Cedex, France

J. Eng. Gas Turbines Power 115(3), 461-466 (Jul 01, 1993) (6 pages) doi:10.1115/1.2906731 History: Received February 06, 1992; Online April 24, 2008


Liquid sheet break-up in coflowing shear flow is the mean by which liquids are atomized in practical injectors for gas turbine combustors. The present study explores experimentally the mechanisms of liquid sheet instabilities and spray formation. Experiments are conducted on four airblast geometries. A high-speed video camera associated with an image processing unit was used to study the liquid sheet instabilities. A microphone and a frequency analyzer were used to track the disintegration frequency. Instability amplitude and disintegration length of the liquid sheet were measured. A two-component Phase Doppler Particle Analyzer was used to characterize the resultant spray. The spatial distribution of the particle size is influenced by the swirling flow field. These experimental results will be used to assess models of fuel sheet instabilities and disintegration.

Copyright © 1993 by The American Society of Mechanical Engineers
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