The correct prediction of the hydrodynamic performance of ships is an important factor in hull form design. This paper presents efficent numericalalgorithms for the calculation of the hydrodynamic forces acting on slender ships. "Parabolized" slender-body theory, generalized to accommodate oblique forward ship motion, transforms a three-deminsional ship wave potentional problem into a series of two-demensional wave-maker problems in the ship frame. The computation starts at the bow section and progress by marching in steps along the ship length. The application of this procedure forhandling surface and interfacial waves created by a prolate spheroid in adensity stratified flow is given; results are compared with published experimental results. The parabolized formulation, with the nonlinear free-surface conditions, is used for calculating the wave pattern and wave resistance of a Wigley hull at zero angle of incidence of ten degrees. A hybrid boundary-element, discrete vortex procedure is used to calculate the potential flow. The strength of the vortices and their development is obtained as a part of solution. The numerical results are compared with published experimental and numerical results.
Numerical algorithms for slender bodies with vortex shedding and densitystratification
Numerische Algorithmen fuer schlanke Koerper mit Wirbelabloesung und Dichteschichtung
Journal of Ship Research ; 40 , 1 ; 11-21
1996
11 Seiten, 18 Bilder, 18 Quellen
Aufsatz (Zeitschrift)
Englisch
Numerical Algorithms for Slender Bodies with Vortex Shedding and Density Stratification
Online Contents | 1996
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