Wave energy absorption by a submerged air bag connected to a rigid float
Wave energy absorption by a submerged air bag connected to a rigid float
A new wave energy device features a submerged ballasted air bag connected at the top to a rigid float. Under wave action, the bag expands and contracts, creating a reciprocating air flow through a turbine between the bag and another volume housed within the float. Laboratory measurements are generally ingood agreement with numerical predictions. Both show that the trajectory of possible combinations of pressure and elevation at which the device is in static equilibrium takes the shape of an S. This means that statically the device can have three different draughts, and correspondingly three different bag shapes, for the same pressure. The behaviour in waves depends on where the mean pressure-elevation condition is on the static trajectory. The captured power is highest for a mean condition on the middle section.
wave energy, numerical modelling, physical experiments, flexible bags
1-17
Kurniawan, Adi
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Chaplin, J R
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Hann, Martyn
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Greaves, Deborah
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Farley, Francis
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April 2017
Kurniawan, Adi
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Chaplin, J R
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Hann, Martyn
5ae72411-3dc6-4683-92eb-db08ee35fc07
Greaves, Deborah
3e92bac9-ef06-408d-8722-fe840fcaa43c
Farley, Francis
96c5b9fa-9af4-49b3-8f26-12b06d2e0d89
Kurniawan, Adi, Chaplin, J R, Hann, Martyn, Greaves, Deborah and Farley, Francis
(2017)
Wave energy absorption by a submerged air bag connected to a rigid float.
Proceedings of the Royal Society A, 473 (2200), .
(doi:10.1098/rspa.2016.0861).
Abstract
A new wave energy device features a submerged ballasted air bag connected at the top to a rigid float. Under wave action, the bag expands and contracts, creating a reciprocating air flow through a turbine between the bag and another volume housed within the float. Laboratory measurements are generally ingood agreement with numerical predictions. Both show that the trajectory of possible combinations of pressure and elevation at which the device is in static equilibrium takes the shape of an S. This means that statically the device can have three different draughts, and correspondingly three different bag shapes, for the same pressure. The behaviour in waves depends on where the mean pressure-elevation condition is on the static trajectory. The captured power is highest for a mean condition on the middle section.
Text
2017 RS ProcA 1611.08712
- Accepted Manuscript
More information
Accepted/In Press date: 28 March 2017
e-pub ahead of print date: 5 April 2017
Published date: April 2017
Keywords:
wave energy, numerical modelling, physical experiments, flexible bags
Organisations:
Civil Maritime & Env. Eng & Sci Unit
Identifiers
Local EPrints ID: 407605
URI: http://eprints.soton.ac.uk/id/eprint/407605
ISSN: 1364-5021
PURE UUID: abec9562-23f6-4ee2-89c7-cf766ba97246
Catalogue record
Date deposited: 16 Apr 2017 16:59
Last modified: 16 Mar 2024 05:12
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Contributors
Author:
Adi Kurniawan
Author:
Martyn Hann
Author:
Deborah Greaves
Author:
Francis Farley
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