Research Article
Mar 1973
Cavitation and Size Scale Effects for Orifices
Publication: Journal of the Hydraulics Division
Volume 99, Issue 3
Abstract
Cavitation data are presented for circular sharp-edged orifices which identify incipient, critical, moderate, heavy, and choking cavitation. The experimental program included pipe sizes from 1 to 23.5 in. (25 to 597 mm), pressures from 20 to 200 psi (140 to 1,400 kn/m²), and orifice size ratios from β = 0.332 to 0.884. Incipient and critical cavitation are affected by pipe size but are independent of pressure and velocity. Choking cavitation is independent of pressure, velocity, and size. An accelerometer was used to evaluate incipient and critical limits. Moderate and heavy cavitation regions were selected by aural observations. Choking flow was identified as the flow condition where the discharge coefficient began to rapidly decrease.
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Published In
Journal of the Hydraulics Division
Volume 99 • Issue 3 • March 1973
Pages: 417 - 430
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: Mar 1973
Published online: Feb 3, 2021
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Authors
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J. Paul Tullis, M.ASCE
Assoc. Prof. of Civ. Engrg., Colorado State Univ., Fort Collins, Colo
Rangachari Govindarajan
Hydr. Engr., Barber Nichols Engrg. Co., Arvada, Cola
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