Suryadi, Alexandre and Schmidt, Florian Nils and Appel, Christina and Reiche, Nils and Ewert, Roland and Herr, Michaela and Wild, Jochen (2022) Noise simulations of flap devices for wind turbine rotors. Wind Energy, n/a (n/a), pp. 1-21. Wiley. doi: 10.1002/we.2784. ISSN 1095-4244.
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Official URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/we.2784
Abstract
The rotor of a large diameter wind turbine experiences more substantial and more dynamic loads due to the fluctuating and heterogeneous wind field. The project SmartBlades 2.0 investigated rotor blade design concepts that alleviate aerodynamic loading using active and passive mechanisms. The present work evaluates the acoustics of the two load alleviating concepts separately, an inboard slat and an outboard flap, using the Fast Random Particle Mesh/Fast Multipole Code for Acoustic Shielding (FRPM/FMCAS) numerical prediction toolchain developed at DLR with input from the averaged flow field from RANS. The numerical tools produce a comparable flap side-edge noise spectrum with that of the measurement conducted in the Acoustic Wind Tunnel Braunschweig (AWB). The validated FRPM/FMCAS was then used to analyze the self-noise from a slat at the inboard section of a rotor blade with a 44.45m radius and compared with that from the outboard trailing edge. Furthermore, the rotational effect of the rotor was included in the post-processing to emulate the noise observed at ground level. The findings show an increase in the slat's overall sound pressure level and a maximum radiation upwind of the wind turbine for the case with the largest wind speed that represents the off-design condition. In operational conditions, the slat adds at most 2dB to the overall sound pressure level. The toolchain evaluates wind turbine noise with conventional or unconventional blade design, and the problem can be scaled up for a full-scale analysis. As such, the tools presented can be used to design low-noise wind turbines efficiently.
Item URL in elib: | https://elib.dlr.de/189143/ | ||||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||||
Additional Information: | Funded by the German Ministry for Economic Affairs and Energy (BMWi). Grant number: 0324032D | ||||||||||||||||||||||||||||||||
Title: | Noise simulations of flap devices for wind turbine rotors | ||||||||||||||||||||||||||||||||
Authors: |
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Date: | 22 September 2022 | ||||||||||||||||||||||||||||||||
Journal or Publication Title: | Wind Energy | ||||||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||||||||||
Gold Open Access: | Yes | ||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||
Volume: | n/a | ||||||||||||||||||||||||||||||||
DOI: | 10.1002/we.2784 | ||||||||||||||||||||||||||||||||
Page Range: | pp. 1-21 | ||||||||||||||||||||||||||||||||
Publisher: | Wiley | ||||||||||||||||||||||||||||||||
ISSN: | 1095-4244 | ||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||
Keywords: | numerical, wind turbine noise | ||||||||||||||||||||||||||||||||
HGF - Research field: | Energy | ||||||||||||||||||||||||||||||||
HGF - Program: | Materials and Technologies for the Energy Transition | ||||||||||||||||||||||||||||||||
HGF - Program Themes: | Photovoltaics and Wind Energy | ||||||||||||||||||||||||||||||||
DLR - Research area: | Energy | ||||||||||||||||||||||||||||||||
DLR - Program: | E SW - Solar and Wind Energy | ||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | E - Wind Energy | ||||||||||||||||||||||||||||||||
Location: | Braunschweig | ||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute for Aerodynamics and Flow Technology > Wind Energy | ||||||||||||||||||||||||||||||||
Deposited By: | Suryadi, Alexandre | ||||||||||||||||||||||||||||||||
Deposited On: | 01 Nov 2022 11:22 | ||||||||||||||||||||||||||||||||
Last Modified: | 07 Mar 2024 18:58 |
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