Wave energy absorption by a floating air bag
Wave energy absorption by a floating air bag
A floating air bag, ballasted in water, expands and contracts as it heaves under wave action. Connecting the bag to a secondary volume via a turbine transforms the bag into a device capable of generating useful energy from the waves. Small-scale measurements of the device reveal some interesting properties, which are successfully predicted numerically. Owing to its compressibility, the device can have a heave resonance period longer than that of a rigid device of the same shape and size, without any phase control. Furthermore, varying the amount of air in the bag is found to change its shape and hence its dynamic response, while varying the turbine damping or the air volume ratio changes the dynamic response without changing the shape.
wave-structure interactions, waves/free-surface flows
294-320
Kurniawan, A.
bc6e09a1-7380-470b-a84e-1194ad9fb098
Chaplin, J.R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Greaves, D. M.
0ec94618-5a7d-4e26-8f24-500997540d1c
Hann, M.
d9ab234f-5805-4d60-9863-0c3e0b913a75
10 February 2017
Kurniawan, A.
bc6e09a1-7380-470b-a84e-1194ad9fb098
Chaplin, J.R.
d5ed2ba9-df16-4a19-ab9d-32da7883309f
Greaves, D. M.
0ec94618-5a7d-4e26-8f24-500997540d1c
Hann, M.
d9ab234f-5805-4d60-9863-0c3e0b913a75
Kurniawan, A., Chaplin, J.R., Greaves, D. M. and Hann, M.
(2017)
Wave energy absorption by a floating air bag.
Journal of Fluid Mechanics, 812, .
(doi:10.1017/jfm.2016.811).
Abstract
A floating air bag, ballasted in water, expands and contracts as it heaves under wave action. Connecting the bag to a secondary volume via a turbine transforms the bag into a device capable of generating useful energy from the waves. Small-scale measurements of the device reveal some interesting properties, which are successfully predicted numerically. Owing to its compressibility, the device can have a heave resonance period longer than that of a rigid device of the same shape and size, without any phase control. Furthermore, varying the amount of air in the bag is found to change its shape and hence its dynamic response, while varying the turbine damping or the air volume ratio changes the dynamic response without changing the shape.
Text
sq171v7 copy
- Accepted Manuscript
Text
2017 JFM812
- Version of Record
Restricted to Repository staff only
Request a copy
More information
Accepted/In Press date: 27 November 2016
e-pub ahead of print date: 28 December 2016
Published date: 10 February 2017
Keywords:
wave-structure interactions, waves/free-surface flows
Organisations:
Civil Maritime & Env. Eng & Sci Unit
Identifiers
Local EPrints ID: 407417
URI: http://eprints.soton.ac.uk/id/eprint/407417
ISSN: 0022-1120
PURE UUID: 416e94d4-6c34-4579-a1cc-26b8215e8a1d
Catalogue record
Date deposited: 05 Apr 2017 01:12
Last modified: 06 Jun 2024 04:03
Export record
Altmetrics
Contributors
Author:
A. Kurniawan
Author:
D. M. Greaves
Author:
M. Hann
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
