MANOEUVRING HYDRODYNAMIC FORCES CALCULATED USING CIRCULATION RETENTION CHARACTERISTICS
Assuming that a ship hull can be replaced by a rectangular flat wing, a simplified method is examined for the calculation of the manoeuvring hydrodynamic forces and shedding angles of the trailing vortices in shallow water. This method is based on the INOUE's method using infinite images with respect to water bottom. The study takes into account bound vortices retained at the wing tip in the shallow water condition. The influence of the vortices remaining in the gap on predicting the hydrodynamic forces and the shedding angles is discussed. It is indicated that the vortices distributed in the gap cause a decrease in the shedding angles and the hydrodynamic forces. However, the change in the hydrodynamic forces is slight compared with that in the shedding angles. It may be concluded that taking account of the vortices in the gap is useful to obtain better agreement between calculated values and experimental values for both the hydrodynamic forces and the shedding angles.
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Supplemental Notes:
- J Kansai Soc Naval Architects, n 224, Sept 1995, p 69 [8 p, 6 ref, 1 tab, 7 fig]
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Authors:
- Yumoro, A
- Publication Date: 1995
Language
- Japanese
Subject/Index Terms
- TRT Terms: Hydrodynamic pressure; Maneuverability; Vortices
- Uncontrolled Terms: Shallow water
- Old TRIS Terms: Hydrodynamic forces; Trailing vortices
- Subject Areas: Marine Transportation;
Filing Info
- Accession Number: 00718730
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Mar 27 1996 12:00AM