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Atomization and Sprays
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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v16.i8.50
pages 933-944

EXPERIMENTAL VISUALIZATIONS OF LIQUID BREAKUP REGIMES IN FUEL SLINGER ATOMIZATION

Werner J. A. Dahm
School for Engineering of Matter, Transport, and Energy Arizona State University Tempe, AZ, 85287, USA
Prashant R. Patel
Laboratory for Turbulence and Combustion, Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI48109-2140, USA
Bryan H. Lerg
Laboratory for Turbulence and Combustion, Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI48109-2140, USA

ABSTRAKT

Results are presented from visualization experiments of liquid atomization in a variety of fuel slinger geometries over a range of operating conditions to identify the fundamental phenomena and breakup regimes encountered in fuel slinger operation and optimization. Film breakup and stream breakup modes are identified. Hole size principally affects the liquid film thickness, whereas hole geometry is found to have a significant effect on atomization performance due to resulting surface tension effects acting on the liquid film. Subcritical and supercritical film-mode breakup regimes are identified as well as regular and irregular film-mode breakup regimes. Despite wide use of such slingers for fuel atomization in small gas turbines, the present results appear to be the first systematic investigation of liquid breakup regimes in such devices.