Investigation of the thrust generated by active isolated hydrofoils via wave-induced ship motion

Mohammad Sadeghi; Hamid Zeraatgar; Mohammad Hossein Ghaemi; Vernengo Giuliano

doi:10.1016/j.oceaneng.2024.120134

Investigation of the thrust generated by active isolated hydrofoils via wave-induced ship motion

Abstract

Wave Augmented Hydrofoil Technology (WAHT) aims to convert hydrofoil movement, induced by ship motion, into thrust force, and ship's resistance reduction in waves. Despite the growing interest in WAHT, a significant research gap remains in understanding the complex interactions between hydrofoil design parameters and wave-induced thrust generation. A hydrofoil attached to a ship serves dual roles; reducing the ship resistance in waves and generating thrust force. To distinguish the resistance reduction to the thrust generation, this study considers an isolated active hydrofoil without the ship's hull. This approach captures the critical interactions driven by ship motion, while allowing for a focused analysis on thrust generation. The active hydrofoil orientation is harmonically adjusted according to the flow vertical velocity that results in a suitable angle of attack. The generated thrust is studied by varying the hydrofoil rotation angle, aspect ratio, wavelength, and forward speed. The vertical velocity of KRISO Container Ship (KCS) in a range of regular waves is already available where KCS model alone (without WAHT) was simulated using Computational Fluid Dynamics (CFD). Simulation of isolated hydrofoil reveals increase of the vertical velocity, span-to-chord ratio, and forward speed of the hydrofoil enhances thrust force. For the studied cases, a 2.5% enhancement of mean generated power relative to required power in waves is concluded.

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Authors (4)

Mohammad Sadeghi
- Amirkabir University of Technology
Hamid Zeraatgar prof.
- Amirkabir University of Technology
Mohammad Hossein Ghaemi (formerly: Mohammad Ghaemi) dr inż.
Vernengo Giuliano
- University of Genoa

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Category:

Articles

Type:

artykuły w czasopismach

Published in:

OCEAN ENGINEERING no. 317,
ISSN: 0029-8018

Language:

English

Publication year:

2025

Bibliographic description:

Sadeghi M., Zeraatgar H., Ghaemi M., Giuliano V.: Investigation of the thrust generated by active isolated hydrofoils via wave-induced ship motion// OCEAN ENGINEERING -Vol. 317,iss. 120134 (2025),

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