Journal article
Multi-fidelity optimization of a high-speed foil-assisted semi-planing catamaran for low wake
Journal of marine science and technology, Vol.16(2), pp.143-156
06/2011
DOI: 10.1007/s00773-011-0119-0
Abstract
The wakes of high-speed passenger-only ferries that operated through Rich Passage, on the Seattle-Bremerton ferry route, caused beach erosion and damage to habitat. A task was initiated to design a low-wake high-speed vessel using multi-fidelity CFD based design optimization by using low-fidelity potential flow solvers for initial global design optimization and by using URANS solvers for high-fidelity tuning of the optimized design. This simulation based design process involved a close collaboration between ship designers, and hydrodynamics and CFD specialists, whose collective expertise guided the evolution of the design based on both hydrodynamic and structural aspects. The initial hull shape optimization using potential flow code was carried out by blending three different initial concepts provided by the designers. Subsequently, URANS was used to evaluate the potential flow optimized hull and to further optimize the hull configuration parameters, namely, the centre-of-gravity, demihull spacing, foil location, foil angle and slenderness ratio at different displacement conditions. The URANS based configuration optimization also took into account the far field wakes’ energy spectrum with an objective of reducing the energetic, low frequency far field wakes which are associated with beach flattening on the mixed sand and gravel beaches. Calculation of the far field wake using URANS would require an unfeasibly large domain size; therefore, a Havelock code with a source distribution matching the URANS calculated near field wave elevation was used to propagate the wakes into the far field. The end result of the optimization was a design with significantly reduced far field wake, which is currently being built for experimental testing.
Details
- Title: Subtitle
- Multi-fidelity optimization of a high-speed foil-assisted semi-planing catamaran for low wake
- Creators
- Manivannan Kandasamy - University of Iowa Iowa City IA USADaniele Peri - INSEAN Rome ItalySeng Ooi - University of Iowa Iowa City IA USAPablo Carrica - University of Iowa Iowa City IA USAFrederick Stern - University of Iowa Iowa City IA USAEmilio Campana - INSEAN Rome ItalyPhilip Osborne - Golder Associates Inc. 18300 NE Union Hill Road, Suite 200 Redmond WA 98052 USAJessica Cote - Golder Associates Inc. 18300 NE Union Hill Road, Suite 200 Redmond WA 98052 USANeil Macdonald - Coldwater Consulting Gloucester ON CanadaNic de Waal - Technicraft Ltd. Birkenhead Auckland New Zealand
- Resource Type
- Journal article
- Publication Details
- Journal of marine science and technology, Vol.16(2), pp.143-156
- Publisher
- Springer Japan; Japan
- DOI
- 10.1007/s00773-011-0119-0
- ISSN
- 0948-4280
- eISSN
- 1437-8213
- Language
- English
- Date published
- 06/2011
- Academic Unit
- Mechanical Engineering; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984064556702771
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