Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | European Wind Energy Association Annual Conference and Exhibition 2015, EWEA 2015 - Scientific Proceedings |
| Herausgeber/-innen | Sandrine Aubrun, Sandrine Aubrun, Jakob Mann |
| ISBN (elektronisch) | 9782930670003 |
| Publikationsstatus | Veröffentlicht - 2015 |
| Veranstaltung | European Wind Energy Association Annual Conference and Exhibition 2015, EWEA 2015 - Paris, Frankreich Dauer: 17 Nov. 2015 → 20 Nov. 2015 |
Publikationsreihe
| Name | European Wind Energy Association Annual Conference and Exhibition 2015, EWEA 2015 - Scientific Proceedings |
|---|
Abstract
Wind speed varies substantially over time. These unsteady wind conditions lead to high dynamic loads on the wind turbine blades. The most common pitch system is too inertial to control these dynamic loads. Plain flaps at the rotor trailing edge have been proven to be an effective load reduction concept. The plain flap's acoustics are presented in this paper. The acoustics are studied with an experimental set-up. The advanced acoustic method beamforming is used to localize the sound source at the plain flap, such as side edge noise. This investigation shows that the flap noise is correlated with the flap deflection angle, and the angle of attack of the entire airfoil. The flap noise of a deflection towards the suction side is limited to a high frequency band. In contrast, a deflection towards the pressure side leads to broadband flap noise. The localization of the side edge noise at the plain flap proves that these differences are not caused by the side edge. The side edge noise in the flap acoustics is limited to the high frequency band. The broadband noise of a deflection towards the pressure side must therefore originate from another source. Flow separation is assumed.
ASJC Scopus Sachgebiete
- Energie (insg.)
- Energieanlagenbau und Kraftwerkstechnik
- Energie (insg.)
- Erneuerbare Energien, Nachhaltigkeit und Umwelt
- Umweltwissenschaften (insg.)
- Management, Monitoring, Politik und Recht
Ziele für nachhaltige Entwicklung
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- RIS
European Wind Energy Association Annual Conference and Exhibition 2015, EWEA 2015 - Scientific Proceedings. Hrsg. / Sandrine Aubrun; Sandrine Aubrun; Jakob Mann. 2015. (European Wind Energy Association Annual Conference and Exhibition 2015, EWEA 2015 - Scientific Proceedings).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Flaps for wind turbine applications
T2 - European Wind Energy Association Annual Conference and Exhibition 2015, EWEA 2015
AU - Brand, C. R.
AU - Seume, J. R.
N1 - Funding information: The present work is funded within the framework of the joint project Smart Blades (0325601A/B/C/D) by the German Federal Ministry for Economic Affairs and Energy (BMWi) under decision of the German Federal Parliament.
PY - 2015
Y1 - 2015
N2 - Wind speed varies substantially over time. These unsteady wind conditions lead to high dynamic loads on the wind turbine blades. The most common pitch system is too inertial to control these dynamic loads. Plain flaps at the rotor trailing edge have been proven to be an effective load reduction concept. The plain flap's acoustics are presented in this paper. The acoustics are studied with an experimental set-up. The advanced acoustic method beamforming is used to localize the sound source at the plain flap, such as side edge noise. This investigation shows that the flap noise is correlated with the flap deflection angle, and the angle of attack of the entire airfoil. The flap noise of a deflection towards the suction side is limited to a high frequency band. In contrast, a deflection towards the pressure side leads to broadband flap noise. The localization of the side edge noise at the plain flap proves that these differences are not caused by the side edge. The side edge noise in the flap acoustics is limited to the high frequency band. The broadband noise of a deflection towards the pressure side must therefore originate from another source. Flow separation is assumed.
AB - Wind speed varies substantially over time. These unsteady wind conditions lead to high dynamic loads on the wind turbine blades. The most common pitch system is too inertial to control these dynamic loads. Plain flaps at the rotor trailing edge have been proven to be an effective load reduction concept. The plain flap's acoustics are presented in this paper. The acoustics are studied with an experimental set-up. The advanced acoustic method beamforming is used to localize the sound source at the plain flap, such as side edge noise. This investigation shows that the flap noise is correlated with the flap deflection angle, and the angle of attack of the entire airfoil. The flap noise of a deflection towards the suction side is limited to a high frequency band. In contrast, a deflection towards the pressure side leads to broadband flap noise. The localization of the side edge noise at the plain flap proves that these differences are not caused by the side edge. The side edge noise in the flap acoustics is limited to the high frequency band. The broadband noise of a deflection towards the pressure side must therefore originate from another source. Flow separation is assumed.
KW - Acoustic
KW - Flap
KW - Innovative concepts
KW - Load reduction concept
KW - Side edge noise
KW - Wind turbine rotor
UR - http://www.scopus.com/inward/record.url?scp=85034227618&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85034227618
T3 - European Wind Energy Association Annual Conference and Exhibition 2015, EWEA 2015 - Scientific Proceedings
BT - European Wind Energy Association Annual Conference and Exhibition 2015, EWEA 2015 - Scientific Proceedings
A2 - Aubrun, Sandrine
A2 - Aubrun, Sandrine
A2 - Mann, Jakob
Y2 - 17 November 2015 through 20 November 2015
ER -