DOUBLE-BODY FLOW THEORY-A NEW LOOK AT THE CLASSICAL PROBLEM
This study explores various methods for calculating potential flow around a double model of ship-like form. The discussion begins with the family of ellipsoids, which is the simplest of three-dimensional shapes possessing three unequal axes of length, beam and draft. For the potential flow past an ellipsoid moving with arbitrary velocity, the solution can be represented, equivalently, by a volume distribution of doublets, or a doublet-layer distributed over the limiting confocal ellipse, as well as by a source-layer or a doublet-layer distributed over the ellipsoid or over an interior confocal ellipsoid. The analytical behavior of these different representations of the solution (for an ellipsoid) is examined in detail. For arbitrary ship-like double models a general formulation of the potential flow problem is presented based on the representation of a body by a center plane distribution of doublets and moments of doublets for translational and rotational body motions. This construction results in an integral equation of the first kind for the doublet density. Several numerical methods investigated so far include an approximate direct method and an iteration scheme. The results for a double-elliptic hull form are presented.
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Supplemental Notes:
- Symposium on Naval Hydrodynamics, 10th, Proceedings, Pap and Discuss, Cambridge, Mass, June 24-28, 1974.
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Corporate Authors:
Office of Naval Research
Department of the Navy, 800 North Quincy Street
Arlington, VA United States 22217 -
Authors:
- Wu, T Y
- Chwang, A T
- Conference:
- Publication Date: 1976
Media Info
- Features: References;
- Pagination: p. 89-106
Subject/Index Terms
- TRT Terms: Bodies of revolution; Hulls; Potential flow
- Old TRIS Terms: Hull forms
- Subject Areas: Design; Marine Transportation;
Filing Info
- Accession Number: 00148547
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: Proceeding
- Files: TRIS
- Created Date: Mar 15 1977 12:00AM