This report supplements an earlier report describing experimental studies
conducted to determine the air requirements of ventilated cavities on hydrofoils
and other submerged bodies in the vicinity of a free surface. Reentrant jet,
trailing vortex, and pulsating cavities were observed.
In the present report, primary attention was given to extending an analysis
of the type reported by Cox and Clayden and later extended by Campbell and
Hilborne for predicting the air requirements of trailing vortex type cavities
and for obtaining pertinent experimental data. It was shown that good agreement
with the experimental data was obtained by both theoretical and semiempirical
Secondary attention was given to further verification of a correlation
parameter previously derived for reentrant jet type cavities. The transition
region between reentrant jet and trailing vortex cavities was also investigated.
For some conditions, pulsating cavities were found in the transition region.
Schiebe, Frank R.; Wetzel, Joseph M..
Further Studies of Ventilated Cavities on Submerged Bodies.
St. Anthony Falls Laboratory.
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