A Design Method for High-Speed Propulsor Blades

[+] Author and Article Information
Paul E. Griffin, Spyros A. Kinnas

Ocean Engineering Group, Department of Civil Engineering, The University of Texas at Austin, Austin, TX 78712

J. Fluids Eng 120(3), 556-562 (Sep 01, 1998) (7 pages) doi:10.1115/1.2820698 History: Received October 14, 1997; Revised April 27, 1998; Online January 22, 2008


This study uses a nonlinear optimization method coupled with a vortex lattice cavitating propeller analysis method to design efficient propeller blades. Different constraints are imposed to improve propeller design. Several advancements in the method are shown, including the option for quadratic skew, user specified skew distribution, and a constraint limiting the minimum pressure in wetted regions of the blade. Results for a series of fully wetted runs demonstrate the effectiveness of the constraint on minimum pressure in preventing the onset of bubble or mid-chord cavitation. A comparison of a design in uniform inflow with a design in non-axisymmetric inflow indicates that a propeller designed by the present method in non-axisymmetric inflow has more favorable cavitating flow characteristics than a propeller design assuming uniform inflow. Results are also shown for a series of runs utilizing the cavity constraints. These results indicate that the present method can be used to improve on propeller designs by imposing constraints on the cavity area and cavity volume velocity harmonics, as well as by using a quadratic skew distribution.

Copyright © 1998 by The American Society of Mechanical Engineers
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