Proceedings of the DTNSRDC (David W. Taylor Naval Ship Research and Development Center) Workshop on Ship Wave-Resistance Computations (2nd) Held at Bethesda, Maryland on 16-17 November 1983,
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
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A main goal of the present and previous workshops was to develop a bank of numerical results for a few selected hull forms. Creation of extensive sets of numerical results, together with corresponding sets of experimental values, is indispensable for objectively evaluating the merits and limitations of the various existing methods of wave-resistance calculation, and for progressing towards development of reliable and practical calculation methods. Five hull forms were suggested for the workshop. These include the Wigley parabolic hull and the Series 60 block coefficient 0.60 hull. Two vertical cylinders infinite draft, one with a round-ended elliptical waterline and the other with a sharp-ended lens-like waterline in the shape of an ogive consisting of two arcs of circle, were suggested for use in the low-speed theories. Both have beamlength ratio, b, equal to 0.15. A fully-0submerged body may provide a useful intermediate test case for development of a numerical method. A prolate spheroid with a 51 ratio of length to midsection diameter and a ratio of submergence depth measured from the axis of the spheroid to the undisturbed free-surface level to the midsection diameter of 0.792, for which there already exist both experimental data and theoretical results, was proposed. Finally, a simple strut-like hull form having constant draft, rectangular framelines, and a substantial parallel middle body, and that is sharp at one end and round at the other end, was proposed.
- Numerical Mathematics
- Marine Engineering
- Fluid Mechanics