Flow boundary interaction effects for marine current energy conversion devices
Flow boundary interaction effects for marine current energy conversion devices
Marine current energy conversion technology is presently at the prototype stage where single devices are deployed, or planned for installation, at isolated testing sites. The flow conditions for marine devices are distinctly different than for similar technologies such as the wind energy industry. The constrained nature of the operating fluid in the vertical plane is likely to introduce some interesting flow effects for marine current energy converters (MCECs).
Experimental work was conducted at two indoor facilities. The first was the Chilworth hydraulics laboratory at the University of Southampton, UK. The working section of this flume is 21m in length, 1.35m width and maximum depth 0.4m for steady operation.
The Chilworth flume was used for studies where the downstream flow field was expected to interact with the bed and water surface. The second facility was the IFREMER circulating channel at Boulogne sur Mer, France. The channel has a working section 18m in length, 4m wide and 2m deep. Disks were positioned at much greater depths than could be attained at the Chilworth flume thus eliminating or minimising any interaction with the bed or water surface.
In order to visualise the flow field around the mesh disk rotor simulators a large number of point measurements were taken. A Nortek Vectrino ADV device was used for high frequency velocity sampling. For higher channel Froude numbers (shallow, faster moving flows) the wake created downstream of the actuator disks is deflected downwards towards the bed. This is in part due to the higher flow rate over the top of the disk caused by the non-uniform vertical velocity profile.
Myers, L. E.
b0462700-3740-4f03-a336-dc5dd1969228
Bahaj, A. S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
Germain, G.
6c7d24e5-f94f-414c-a7a1-3399df3bbddd
2008
Myers, L. E.
b0462700-3740-4f03-a336-dc5dd1969228
Bahaj, A. S.
a64074cc-2b6e-43df-adac-a8437e7f1b37
Germain, G.
6c7d24e5-f94f-414c-a7a1-3399df3bbddd
Myers, L. E., Bahaj, A. S. and Germain, G.
(2008)
Flow boundary interaction effects for marine current energy conversion devices.
10th World Renewable Energy Congress 2008, Glasgow, Scotland.
19 - 25 Jul 2008.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Marine current energy conversion technology is presently at the prototype stage where single devices are deployed, or planned for installation, at isolated testing sites. The flow conditions for marine devices are distinctly different than for similar technologies such as the wind energy industry. The constrained nature of the operating fluid in the vertical plane is likely to introduce some interesting flow effects for marine current energy converters (MCECs).
Experimental work was conducted at two indoor facilities. The first was the Chilworth hydraulics laboratory at the University of Southampton, UK. The working section of this flume is 21m in length, 1.35m width and maximum depth 0.4m for steady operation.
The Chilworth flume was used for studies where the downstream flow field was expected to interact with the bed and water surface. The second facility was the IFREMER circulating channel at Boulogne sur Mer, France. The channel has a working section 18m in length, 4m wide and 2m deep. Disks were positioned at much greater depths than could be attained at the Chilworth flume thus eliminating or minimising any interaction with the bed or water surface.
In order to visualise the flow field around the mesh disk rotor simulators a large number of point measurements were taken. A Nortek Vectrino ADV device was used for high frequency velocity sampling. For higher channel Froude numbers (shallow, faster moving flows) the wake created downstream of the actuator disks is deflected downwards towards the bed. This is in part due to the higher flow rate over the top of the disk caused by the non-uniform vertical velocity profile.
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Published date: 2008
Venue - Dates:
10th World Renewable Energy Congress 2008, Glasgow, Scotland, 2008-07-19 - 2008-07-25
Identifiers
Local EPrints ID: 75275
URI: http://eprints.soton.ac.uk/id/eprint/75275
PURE UUID: e915d714-7357-49e4-bd40-206384cd560f
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Date deposited: 18 Mar 2010
Last modified: 23 Jul 2022 01:49
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Contributors
Author:
G. Germain
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