Atomization and Sprays Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

For Online Access

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2000, Volume10

Issue 6

132 pages

Issue price - $75.00

Mark E. Henry
Beal Aerospace, Frisco, Texas, U.S.A.

Steven H. Collicott
School of Aeronautics and Astronautics, Purdue University, 1375 Aviation Drive, West Lafayette, IN 47907-2015, USA

Cavitation in atomizing orifices remains a consistent design problem in many modern engineering applications, and few analytical or numerical tools exist for its prediction. Visualization of cavitation in slot orifices at pressures up to 5 atm is reported. Slots with a minimum dimension ranging from 0.127 to 1.525 mm are studied. The incipient and desinent cavitation pressures are found for a variety of slot sizes. The extent of cavitation within the orifice as a function of cavitation number is also established for these slots. The liquid-vapor interface varies dramatically with slot geometry and local surface conditions at the inlet corner.
Cavitation in certain sized orifices is observed to experience a complex, and apparently cyclical, growth and disintegration process. This leads to the conclusion that the constant contraction coefficient assumed by previous works is in error. The growth cycle is examined and discussed for one such slot geometry.

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