Hydrodynamic design of an oscillating foil propulsor

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TypeTechnical Report
Series titleLaboratory Memorandum
Subjectdesign; hydrodynamic design; propeller; propulsor; oscillating foil; elastic foil
AbstractAn oscillating foil propulsor was designed for a 200,000 DWT tanker using 2-dimensional linearized and nonlinear theories. The linearized theory was used to obtain the optimal motion of the foil, i.e. the most efficient motion for the required thrust, and the propulsive performance was estimated by the more precise nonlinear theory. An aft half elastic foil propulsor was designed as well as a rigid foil one. The results showed that the propulsive efficiency of the elastic foil propulsor was about 72% and 5.0% more than that of a screw propeller designed for comparison. The efficiency increase produced by the present oscillating foil propulsor was attributed to the considerable increase in the propeller working area due to the wide span of the foil. It can be said, therefore, that an oscillating foil propulsor becomes effective for a wide span ship where a conventional single screw propeller cannot avoid high propeller loading.
Publication date
PublisherNational Research Council Canada. Institute for Marine Dynamics
PlaceSt. John's, NL
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
IdentifierLM-1992-19
NRC number5484
NPARC number8895275
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Record identifier88a82d64-88d3-4834-b140-872ccca225d4
Record created2009-04-22
Record modified2016-10-03
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