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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Fruman,  D., and Aflalo,  S., 1989, “Tip Vortex Cavitation Inhibition by Drag Reducing Polymer Solution,” ASME J. Fluids Eng., 111, pp. 211–216.
Fruman,  D. H., Pichon,  T., and Cerrutti,  P., 1995, “Effect of Drag-Reducing Polymer Solution Ejection on Tip Vortex Cavitation,” SNAJ J. Marine Sci. Technol.,1, pp. 13–23.
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Latorre,  R., 1980, “Study of Tip Vortex Cavitation Noise From Foils and Propellers,” Int. Shipbuilding Prog.,27, pp. 66–85.
Platzer, G. P., and Souders, W. G., 1981, “Tip Vortex Cavitation Characteristics-Delay on a Three Dimensional Hydrofoil,” Proc. 19th ATTC Meeting, Univ. of Michigan, Ann Arbor, pp. 989–1022.
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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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Bubble radius and corresponding bubble capture noise (bubble is stable)
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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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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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