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Author Nazemian, Amin
Affiliation Amirkabir University of Technology, Department of Maritime Engineering Tehran, Iran
E-mail anazemian@aut.ac.ir
Author Ghadimi, Parviz
Affiliation Amirkabir University of Technology, Department of Maritime Engineering Tehran, Iran
E-mail pghadimi@aut.ac.ir
ISSN printed 1733-8670
URI https://repository.am.szczecin.pl/handle/123456789/2625
Abstract This paper investigates improving the leading-edge of a hydrofoil with sinusoidal protuberances based on its hydrodynamic performance. The original hydrofoil geometry was inspired by the leading edge of the flipper of a humpback whale. A multi-step optimization process was performed for a 634-021 hydrofoil. The free-form deformation technique defined the shape parameters as a variable design, and these parameters included the amplitude of the leading-edge protuberances, which ranged from 0 to 20% of the chord length, and the corrugate span, with 3 and 4 crests. The flow characteristics of a parametric hydrofoil were examined using a CFD solver, and the lift, drag, and lift-to-drag ratio (L/D) were computed as responses to the optimization cycle. To accomplish this, two design study methods were sequentially applied at different angles of attack. A full factorial design sweep tool was applied that went through all parameter value combinations, and an RBF-based surrogate model was constructed to investigate the system behavior. The results indicated the existence of an optimum design point, and the highest L/D ratio was determined to be 10.726 at a 12° angle of attack.
Pages 116-123
Publisher Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie
Keywords humpback whale flippers
Keywords leading-edge protuberances
Keywords free-form deformation (FFD)
Keywords surrogate model
Keywords CFD
Keywords lift-to-drag ratio (L/D)
Title Shape optimization of a hydrofoil with leadingedge protuberances using full factorial sweep sampling and an RBF surrogate model
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ISSN on-line 2392-0378
Language English
Funding No data
Figures 10
Tables 1
DOI 10.17402/426
Published 2020-06-29
Accepted 2020-05-27
Recieved 2020-04-11


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