Streamlining Buoy Shapes to Minimize Drag and Vortex Induced Motions

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DOI	Resolve DOI: https://doi.org/10.4224/8894952
Author	Search for: Hurley, J.
Format	Text
Type	Technical Report
Series title	Laboratory Memorandum; no. LM-2004-24
Subject	spherical buoy; drag; streamlining; vortex street; CFD; FLUENT; axi-symmetric body; surface of revolution
Abstract	Several axi-symmetric surfaces or revolution are introduced as possible cowlings to be attached to an existing spherical buoy to create a streamlined buoy shape that minimizes the drag force and reduces vortex shedding whilst the buoy remains stable and self-aligning in tidal flows. Analysis of the proposed shapes is carried out by CFD software and a proposed shape is found that reduces the drag force to 25% of that of the original spherical buoy. As well, analysis of data from an axi-symmetric airship Akron is performed to investigate lift, drag, pitching moment, pressure distributions and centers of effort of surfaces of revolution as functions of angle of attack.
Publication date	2004
Publisher	National Research Council of Canada. Institute for Ocean Technology
Place	St. John's, NL
NRC number	NRC-IOT-6072
NPARC number	8894952
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Record identifier	c2c194d8-5800-4cf5-b8e4-f444fe887d8f
Record created	2009-04-22
Record modified	2020-03-06