ABSTRACT

A CFD-based ship hydrodynamic optimization tool has been further developed for generating and designing optimal bulbous bow and stern end bulb for reduced drag. To illustrate the tool, the Model 5279 that is a patrol frigate without bulbous bow and stern end bulb is adopted as an initial hull. Three optimization cases are considered for reduced drag:

  • the bow part of the initial hull as well as the stem profile are modified to generate an optimal hull with a bulbous bow;

  • a stern end bulb is designed and attached to the initial hull to generate an optimal hull with stern end bulb;

  • an optimal hull form with bulbous bow and stern end bulb is generated by combining case

    • and case

    • Model test has been performed for the original hull form and the optimal hull form obtained in case

    • An appreciable drag reduction has been verified by the experimental measurement, which demonstrates that the present CFD-based ship hydrodynamic optimization tool can be used to produce an optimal hull form.

Keywords:
radial basis function, new initial hull, sectional area curve, coefficient, hull form, stern end bulb, hull surface, design variable, optimal hull, reduction
Subjects:
Information Management and Systems
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2013. International Society of Offshore and Polar Engineers
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