CFD, potential flow and system-based simulations of fully appended free running 5415m in calm water and waves
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/332334
Tipus de documentText en actes de congrés
Data publicació2015
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
5415M, course-keeping, waves, CFD, validation, NATO AVT-161
Abstract. The seakeeping ability of ships is one of the aspects that needs to be assessed during
the design phase of ships. Traditionally, potential flow calculations and model tests are employed
to investigate whether the ship performs according to specified criteria. With the increase of
computational power nowadays, advanced computational tools such as Computational Fluid
Dynamics (CFD) become within reach of application during the assessment of ship designs.
In the present paper, a detailed validation study of several computational methods for
ship dynamics is presented. These methods range from low-fidelity system-based methods, to
potential flow methods, to high-fidelity CFD tools. The ability of the methods to predict motions
in calm water as well as in waves is investigated. In calm water, the roll decay behavior of a
fully appended self-propelled free running 5415M model is investigated first.
Subsequently, forced roll motions simulated by oscillating the rudders or stabilizer fins
are studied. Lastly, the paper discusses comparisons between experiments and simulations in waves
with varying levels of complexity, i.e. regular head waves, regular beam waves and bi-chromatic
waves.
The predictions for all methods are validated with an extensive experimental data set for ship
motions and loads on appendages such as rudders, fins and bilge keels. Comparisons between the
different methods and with the experiments are made for the relevant motions and the
high fidelity CFD results are used to explain some of the complex physics. The course keeping and
seakeeping of the model, the reduction rate of the roll motion, the effectiveness of the fin
stabilizers as roll reduction device and the interaction of the roll motion with other motions are
investigated as well. The paper shows that only high-fidelity CFD is able to accurately
predict all the relevant physics during roll decay, forced oscillation and sailing in waves.
CitacióSadat-Hosseini, H. [et al.]. CFD, potential flow and system-based simulations of fully appended free running 5415m in calm water and waves. A: MARINE VI. "MARINE VI : proceedings of the VI International Conference on Computational Methods in Marine Engineering". CIMNE, 2015, p. 306-326. ISBN 978-84-943928-6-3.
ISBN978-84-943928-6-3
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Marine-2015-24_CFD POTENTIAL FLOW AND SYSTEM.pdf | 1,167Mb | Visualitza/Obre |