Although cavitation inception in jets has been studied extensively, little is known about the more complex problem of a jet flow interacting with an outer flow behind a moving body. This problem is studied experimentally by considering inception behind an axisymmetric body driven by a waterjet. Tests were carried out for various water tunnel velocities and jet speeds such that jet velocity ratio could be varied in the range of 0–2. Distinctly different cavitation patterns were observed at zero jet velocity (when cavitation appeared in spiral vortices in such flows) and at various jet velocity ratios (when cavitation appeared around the jet in such flows). A simple superposition analysis, utilizing particle imaging velocimetry (PIV) measurements, is able to qualitatively predict the experimental result. On the basis of these observations, a numerical prediction of cavitation inception number based on viscous-inviscid interaction concept is suggested.
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November 2009
Research Papers
Cavitation Inception in the Wake of a Jet-Driven Body
Roger E. A. Arndt,
Roger E. A. Arndt
University of Minnesota
, 2 Third Avenue SE, Minneapolis, MN 55414
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Eduard L. Amromin,
Eduard L. Amromin
Mechmath LLC
, 14530 Bluebird Trail, Prior Lake, MN 55372-1283
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William Hambleton
William Hambleton
University of Minnesota
, 2 Third Avenue SE, Minneapolis, MN 55414
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Roger E. A. Arndt
University of Minnesota
, 2 Third Avenue SE, Minneapolis, MN 55414
Eduard L. Amromin
Mechmath LLC
, 14530 Bluebird Trail, Prior Lake, MN 55372-1283
William Hambleton
University of Minnesota
, 2 Third Avenue SE, Minneapolis, MN 55414J. Fluids Eng. Nov 2009, 131(11): 111302 (8 pages)
Published Online: October 27, 2009
Article history
Received:
August 19, 2008
Revised:
September 28, 2009
Published:
October 27, 2009
Citation
Arndt, R. E. A., Amromin, E. L., and Hambleton, W. (October 27, 2009). "Cavitation Inception in the Wake of a Jet-Driven Body." ASME. J. Fluids Eng. November 2009; 131(11): 111302. https://doi.org/10.1115/1.4000388
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