NDLI: Hydrodynamic optimization of a catamaran hull with large bow and stern bulbs installed on the center plane of the catamaran

Content Provider	Springer Nature Link
Author	Saha, Goutam Kumar Suzuki, Kazuo Kai, Hisashi
Copyright Year	2005
Abstract	Here, a numerical optimization procedure is proposed for a fundamental study of a fast catamaran, and we compare the wave-making characteristics of a catamaran hull form with and without large bow and stern airship-type bulbs installed on the center plane of a catamaran operating at high speed. The method involves coupled ideas from two distinct research fields: numerical ship hydrodynamics and a nonlinear programming technique. The wave-making characteristics of catamaran hulls with and without bulbs were investigated using the panel method applied to free surface flow (PAFS), in which Morino’s method for lifting bodies is extended to analyze the problem of free surface flow, and PAFS is linked to the optimization procedure of the sequential quadratic programming (SQP) technique. An optimum hull form for a catamaran can be obtained through a series of iterative computations, subject to some design constraints. Here, only the hull shape of a catamaran is optimized with and without center-plane bow and stern bulbs. The optimization is carried out at two Froude numbers, 0.45 and 0.5, which are around the last hump of the wave-making resistance curve. The numerical results show that a reduction in wave-making resistance is achieved around the design speed.
Starting Page	32
Ending Page	40
Page Count	9
File Format	PDF
ISSN	09484280
Journal	Journal of Marine Science and Technology
Volume Number	10
Issue Number	1
e-ISSN	14378213
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-03-31
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wavemaking resistance Catamaran Airship bulb SQP Engineering Fluid Dynamics Mechanical Engineering Engineering Design Automotive and Aerospace Engineering, Traffic Offshore Engineering
Content Type	Text
Resource Type	Article
Subject	Oceanography Ocean Engineering Mechanics of Materials Mechanical Engineering

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