On the inter-foil spacing and phase lag of tandem flapping foil propulsors
On the inter-foil spacing and phase lag of tandem flapping foil propulsors
The aim of this article is to provide a theoretical basis upon which to advance and deploy novel tandem flapping foil systems for efficient marine propulsion. We put forth three key insights into tandem flapping foil hydrodynamics related to their choreography, propulsive efficiency, and unsteady loading. In particular, we propose that the performance of the aft foil depends on a new nondimensional number, s/Utau, which is the inter-foil separation s normalized by the distance that the freestream U advects in one flapping period tau. Additionally, we show how unsteady loading can be mitigated through choice of phase lag.
1-39
Epps, Brenden P.
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Muscutt, Luke
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Roesler, Bernard
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Weymouth, Gabriel
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Ganapathisubramani, Bharath
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Epps, Brenden P.
92b3da5d-83bb-474e-a179-9fae9cde1342
Muscutt, Luke
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Roesler, Bernard
1fd1f857-77d5-4eff-82e1-068b6509bf8f
Weymouth, Gabriel
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0
Ganapathisubramani, Bharath
5e69099f-2f39-4fdd-8a85-3ac906827052
Epps, Brenden P., Muscutt, Luke, Roesler, Bernard, Weymouth, Gabriel and Ganapathisubramani, Bharath
(2016)
On the inter-foil spacing and phase lag of tandem flapping foil propulsors.
Journal of Ship Production and Design, .
(doi:10.5957/JSPD.32.4.150027).
Abstract
The aim of this article is to provide a theoretical basis upon which to advance and deploy novel tandem flapping foil systems for efficient marine propulsion. We put forth three key insights into tandem flapping foil hydrodynamics related to their choreography, propulsive efficiency, and unsteady loading. In particular, we propose that the performance of the aft foil depends on a new nondimensional number, s/Utau, which is the inter-foil separation s normalized by the distance that the freestream U advects in one flapping period tau. Additionally, we show how unsteady loading can be mitigated through choice of phase lag.
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JSPD_Epps_tandem_foils_v15 accepted preprint manuscript.pdf
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Accepted/In Press date: 1 July 2016
e-pub ahead of print date: 15 August 2016
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 399243
URI: http://eprints.soton.ac.uk/id/eprint/399243
ISSN: 2158-2866
PURE UUID: 66314edf-c91d-4ddf-b741-b15a6d919982
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Date deposited: 11 Aug 2016 08:51
Last modified: 15 Mar 2024 03:47
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Author:
Brenden P. Epps
Author:
Luke Muscutt
Author:
Bernard Roesler
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