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TECHNICAL BRIEFS

Computational Study of the Flow Around a Ducted Tip Hydrofoil

[+] Author and Article Information
Hildur Ingvarsdottir, Carl Ollivier-Gooch, Sheldon I. Green

Department of Mechanical Engineering, The University of British Columbia, 2324 Main Mall, Vancouver BC, V6T 1Z4, Canada

J. Fluids Eng 127(1), 172-176 (Mar 22, 2005) (5 pages) doi:10.1115/1.1852489 History: Received November 16, 2001; Revised April 12, 2004; Online March 22, 2005

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References

Crump, S. F., 1948, “The Effects of Bulbous Blade Tips on the Development of Tip Vortex Cavitation on Model Marine Propellers,” Report C-99, David Taylor Naval Ship Research and Development Center, Bethesda, MD.
Mani,  K., Sharma,  S. D., and Arakeri,  V. H., 1988, “Effect on Propeller Blade Modification and Cavitation Induced Noise,” FED (Am. Soc. Mech. Eng.), 64, pp. 64–67.
Itoh,  S., Ishii,  N., Tagori,  T., and Ide,  T., 1987, “Study of the Propeller With Small Blades on the Blade Tips (1st Report),” J. Soc. Naval Architects Japan,159, pp. 82–90. (Published in Japanese with English abstract).
Fruman,  D. H., and Aflalo,  S. S., 1989, “Tip Vortex Cavitation Inhibition by Drag Reducing Polymer Solutions,” ASME J. Fluids Eng., 111, pp. 211–216.
Chahine,  G. L., Frederick,  G. F., and Bateman,  R. D., 1993, “Propeller Tip Vortex Cavitation Suppression Using Selective Polymer Injection,” ASME J. Fluids Eng., 115, pp. 497–503.
Green, S. I., Acosta, A. J., and Akbar, R., 1988, “The Influence on Tip Geometry on Trailing Vortex Rollup and Cavitation Performance,” ASME, Cavitation and Multiphase Flow Forum, Cincinatti, OH, pp. 76–80.
Green,  S. I., and Duan,  S. Z., 1995, “The Ducted Tip—A Hydrofoil Tip Geometry With Superior Cavitation Performance,” ASME J. Fluids Eng., 117, pp. 665–672.
Hordnes,  I., and Green,  S. I., 1998, “Sea Trials of the Ducted Tip Propeller,” ASME J. Fluids Eng., 120, pp. 808–817.
Dacles-Mariani,  J., Zilliac,  G. G., Chow,  J. S., and Bradshaw,  P., 1995, “Numerical/Experimental Study of a Wingtip Vortex in the Near Field,” AIAA J., 33(9), pp. 1561–1568.
Hsiao,  C., and Pauley,  L. L., 1998, “Numerical Study of the Steady-State Tip Vortex Flow Over a Finite-Span Hydrofoil,” ASME J. Fluids Eng., 120, pp. 345–353.
Hsiao,  C., and Pauley,  L. L., 1999, “Numerical Computation of Tip Vortex Flow Generated by a Marine Propeller,” ASME J. Fluids Eng., 121, pp. 638–645.
Green, S. I., 1988, “Tip Vortices—Single Phase and Cavitating Flow Phenomena,” Ph.D. thesis, California Institute of Technology.
CFD Research Corporation, 2001, CFD-GEOM User’s Guide, Huntsville, Alabama.
Ingvarsdottir, H., 2001, “Computational Studies of the Flow Around Rounded and Ducted Tip Hydrofoils,” M.A.Sc. thesis, University of British Columbia.
CFD Research Corporation, 2001, CFD-ACE(U) User’s Guide, Huntsville, Alabama.

Figures

Grahic Jump Location
Grid topology for the ducted tip hydrofoil
Grahic Jump Location
Surface vector pictures of the (a) suction side, (b) tip, and (c) pressure side of the ducted tip hydrofoil at α=12 deg
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SFV photographs of the (a) suction side, (b) tip, and (c) pressure side of the ducted tip hydrofoil at α=12 deg
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Flow angles at α=12 deg. (a) Outboard flow angles at the trailing edge on the suction side. (b) Outboard flow angles at the trailing edge on the pressure side. (c) Downwash flow angles at the tip.
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Streamwise (x) component of vorticity in the x-z plane right behind the trailing edge (x/c=1.05) of the (a) rounded tip and (b) ducted tip hydrofoil at α=12 deg and Re=1.2×106
Grahic Jump Location
Sectional lift along spanwise stations of the computational hydrofoils at α=7 deg and Re=1.2×106

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