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Study on Bow Shape Optimization of Ultra Large Block Coefficient Ship and CFD Simulations of Initial and Optimized Hull Forms

http://hdl.handle.net/20.500.12678/0000007178
ca25505e-70e3-4f1e-8716-1ba9bbcf93fc
cdc21025-6e6e-46be-b943-c52f78d961cd
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20_1(JASNAOE)2014_Journal 20_1(JASNAOE)2014_Journal paper _Dr.Aye Aye Mon.pdf (1.7 MB)
Publication type
Journal article
Upload type
Publication
Title
Title Study on Bow Shape Optimization of Ultra Large Block Coefficient Ship and CFD Simulations of Initial and Optimized Hull Forms
Language en
Publication date 2014-06-02
Authors
Aye Aye Mon, Kazuo Suzuki, Takanori Hino
Description
The present paper describes a hull form improvement of
innovative low-speed Ultra Large Block coefficient Ship (ULBS). A hull form
optimization method for reducing wave-making resistance and wave-
breaking at the bow using nonlinear programming method (NLP) based on
the Rankine source method is discussed. In the optimization process,
wave-making resistance coefficient, surface integrals of the square of free
surface elevations and free surface disturbance function D(x,y)-values are
selected as the objective functions. Bow-body shape is optimized under the
prescribed design constraints based on the present method. Numerical
examples are given for unconventional ULBS. The three improved hull
forms for the corresponding objective functions are obtained by optimal
designs which indicate that the objective functions are reduced distinctly. In
order to verify the present optimization method based on the potential
solver, the flow characteristics around the initial and bow optimized hull
forms are analyzed by using Computational Fluid Dynamics (CFD) analysis
based on the Navier-Stokes (NS) solver. Comparisons of the computed
resistance coefficients, pressure and velocity distributions of the initial and
bow optimized hull forms are presented. It is confirmed that simulation
results based on the viscous flow solver show reasonable agreements with
the numerical results based on the Rankine source method for the bow
optimized hull forms.
Keywords
Hull Form Optimization, Wave-making Resistance, Rankine source method
Identifier https://doi.org/10.2534/jjasnaoe.20.13
Journal articles
Volume 20 (2014)
Journal of Japan Society of Naval Architects and Ocean Engineers (JASNAOE)
1-11
Volume: 20
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