Effect of aspect ratio on the propulsive performance of tandem flapping foils
Effect of aspect ratio on the propulsive performance of tandem flapping foils
In this work, we describe the impact of aspect ratio on the performance of optimally phased, identical flapping flippers in a tandem configuration. Three-dimensional simulations are performed for seven sets of single and tandem finite foils at a moderate Reynolds number, with thrust producing, heave-to-pitch coupled kinematics. Increasing slenderness (or) is found to improve thrust coefficients and thrust augmentation but the benefits level off towards higher values of. However, the propulsive efficiency shows no significant change with increasing, while the hind foil outperforms the single by a small margin. Further analysis of the spanwise development and propagation of vortical structures allows us to gain some insights into the mechanisms of these wake interactions and provide valuable information for the design of novel biomimetic propulsion systems.
Autonomous underwater vehicles, Swimming/flying, Vortex dynamics
Lagopoulos, Nikolaos
8a38fce1-8fa9-4dec-a2b0-db0e9372c575
Weymouth, Gabriel D.
f2976de1-6e6f-4e99-b837-87ae33659dc8
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052
31 January 2023
Lagopoulos, Nikolaos
8a38fce1-8fa9-4dec-a2b0-db0e9372c575
Weymouth, Gabriel D.
f2976de1-6e6f-4e99-b837-87ae33659dc8
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052
Lagopoulos, Nikolaos, Weymouth, Gabriel D. and Ganapathisubramani, Bharathram
(2023)
Effect of aspect ratio on the propulsive performance of tandem flapping foils.
Flow, 3, [E1].
(doi:10.1017/flo.2022.35).
Abstract
In this work, we describe the impact of aspect ratio on the performance of optimally phased, identical flapping flippers in a tandem configuration. Three-dimensional simulations are performed for seven sets of single and tandem finite foils at a moderate Reynolds number, with thrust producing, heave-to-pitch coupled kinematics. Increasing slenderness (or) is found to improve thrust coefficients and thrust augmentation but the benefits level off towards higher values of. However, the propulsive efficiency shows no significant change with increasing, while the hind foil outperforms the single by a small margin. Further analysis of the spanwise development and propagation of vortical structures allows us to gain some insights into the mechanisms of these wake interactions and provide valuable information for the design of novel biomimetic propulsion systems.
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effect-of-aspect-ratio-on-the-propulsive-performance-of-tandem-flapping-foils
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Accepted/In Press date: 22 November 2022
Published date: 31 January 2023
Additional Information:
Funding Information:
This research was supported financially by the Office of Naval Research award N62909-18-1-2091 and the Engineering and Physical Sciences Research Council doctoral training award (1789955).
Publisher Copyright:
© The Author(s), 2023. Published by Cambridge University Press.
Keywords:
Autonomous underwater vehicles, Swimming/flying, Vortex dynamics
Identifiers
Local EPrints ID: 474866
URI: http://eprints.soton.ac.uk/id/eprint/474866
ISSN: 2633-4259
PURE UUID: 1cd77157-1b21-41f1-9771-def214aaff9b
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Date deposited: 03 Mar 2023 17:51
Last modified: 17 Mar 2024 03:22
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Author:
Nikolaos Lagopoulos
Author:
Gabriel D. Weymouth
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