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Some observations of tip-vortex cavitation

Published online by Cambridge University Press:  26 April 2006

R. E. A. Arndt ,
V. H. Arakeri  and
H. Higuchi
R. E. A. Arndt
Affiliation:
St. Anthony Falls Hydraulic Laboratory, University of Minnesota. Minneapolis. MN 55455, USA
V. H. Arakeri
Affiliation:
Indian Institute of Science, Bangalore, India
H. Higuchi
Affiliation:
Syracuse University, NY 13210, USA
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Abstract

Cavitation has been observed in the trailing vortex system of an elliptic planform hydrofoil. A complex dependence on Reynolds number and gas content is noted at inception. Some of the observations can be related to tension effects associated with the lack of sufficiently large-sized nuclei. Inception measurements are compared with estimates of pressure in the vortex obtained from LDV measurements of velocity within the vortex. It is concluded that a complete correlation is not possible without knowledge of the fluctuating levels of pressure in tip-vortex flows. When cavitation is fully developed, the observed tip-vortex trajectory shows a surprising lack of dependence on any of the physical parameters varied, such as angle of attack, Reynolds number, cavitation number, and dissolved gas content.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 229 , August 1991 , pp. 269 - 289
Copyright
© 1991 Cambridge University Press

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