Investigation of the Role of Polymer on the Delay of Tip Vortex Cavitation

[+] Author and Article Information
R. Latorre

Naval Architecture & Marine Engineering, University of New Orleans, LA 70148 USA

A. Muller, J. Y. Billard, A. Houlier

Hydrodynamic Laboratory, Ecole Navale, Brest, 29240 France

J. Fluids Eng 126(5), 724-729 (Dec 07, 2004) (6 pages) doi:10.1115/1.1792260 History: Received June 23, 1999; Revised April 29, 2004; Online December 07, 2004
Copyright © 2004 by ASME
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Delay of elliptical foil tip vortex calculation inception (foil details in Table 1) Re=106, polymer concentration: 1000 ppm, cavitation number uncertainty estimated to be <±2.5% 2.
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Foil geometry and simulated bubble trajectory radius Rt/R1 during bubble capture α=10 deg (case II in Table 2) σ=2.0
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Bubble radius and corresponding bubble capture noise (bubble is stable)
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Determination of the cavitation noise inception using background noise and the simulated bubble capture noise (±2.0% numerical accuracy) for a given cavitation number σ=2.0
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Change of bubble stability bounding Δσ by introduction of lower surface tension from polymer solution (numerical uncertanty estimated to be <±1.25%)
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Comparison of tip vortex cavitation inception σI from simulations with measurements of Fruman et al. 2 (experimental cavitation number uncertainty estimated to be <±2.5%; numerical uncertainty estimated to be <±1.25%)




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