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On the application of active flow control to wind turbines

On the application of active flow control to wind turbines
On the application of active flow control to wind turbines
This paper reviews recent studies conducted at Tel-Aviv University that were aimed at applying active flow control technology to large and small scale wind turbines with the purpose of improved performance and reduced noise emission. Large wind turbines suffer from degradation of surface quality over the 20 years life span. Premature transition results and promotes early turbulent separation. Energizing the boundary layer with vortex generators (VG’s) and active flow control is studied. While both methods are capable of recovering lost performance, VG’s have an off-design drag penalty, while AFC can be turned off when not needed. It is demonstrated that AFC is highly energy efficient. Small wind turbines suffer from low Reynolds number effects resulting from low wind speed, small chord and low tip speed ratio. Passive and semi-active flow control methods are applied to a small vertical axis wind turbine (VAWT) with the purpose of delaying boundary layer separation via forced transition and transient semi-active fluidic jets. Power extraction at low wind speeds is demonstrated to be greatly improved.
978-0-7918-4440-3
3057-3064
Seifert, Avraham
5fa00ae2-672d-4d86-8d0d-48106c697169
Stalnov, Oksana
6ca7508b-4d32-4e46-9158-ef8f03795ece
Troshin, Victor
f2c7f468-af54-4b2a-97a6-a709c6621ae4
Avnaim, Maor Hai
d053582b-18dc-4bb6-9747-5a2ce52d63f9
Seifert, Avraham
5fa00ae2-672d-4d86-8d0d-48106c697169
Stalnov, Oksana
6ca7508b-4d32-4e46-9158-ef8f03795ece
Troshin, Victor
f2c7f468-af54-4b2a-97a6-a709c6621ae4
Avnaim, Maor Hai
d053582b-18dc-4bb6-9747-5a2ce52d63f9

Seifert, Avraham, Stalnov, Oksana, Troshin, Victor and Avnaim, Maor Hai (2011) On the application of active flow control to wind turbines. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. 24 - 29 Jul 2011. pp. 3057-3064 . (doi:10.1115/AJK2011-13006).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper reviews recent studies conducted at Tel-Aviv University that were aimed at applying active flow control technology to large and small scale wind turbines with the purpose of improved performance and reduced noise emission. Large wind turbines suffer from degradation of surface quality over the 20 years life span. Premature transition results and promotes early turbulent separation. Energizing the boundary layer with vortex generators (VG’s) and active flow control is studied. While both methods are capable of recovering lost performance, VG’s have an off-design drag penalty, while AFC can be turned off when not needed. It is demonstrated that AFC is highly energy efficient. Small wind turbines suffer from low Reynolds number effects resulting from low wind speed, small chord and low tip speed ratio. Passive and semi-active flow control methods are applied to a small vertical axis wind turbine (VAWT) with the purpose of delaying boundary layer separation via forced transition and transient semi-active fluidic jets. Power extraction at low wind speeds is demonstrated to be greatly improved.

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More information

Published date: July 2011
Venue - Dates: ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 2011-07-24 - 2011-07-29
Organisations: Aeronautics, Astronautics & Comp. Eng

Identifiers

Local EPrints ID: 355341
URI: http://eprints.soton.ac.uk/id/eprint/355341
ISBN: 978-0-7918-4440-3
PURE UUID: 6d7e280c-ba3e-42da-865b-27d82cd67408

Catalogue record

Date deposited: 02 Aug 2013 13:32
Last modified: 24 Sep 2018 16:31

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