Experimental characterization of vortex generators induced noise of wind turbines

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

The wind energy industry is progressively aiming towards larger wind turbine size as a means of increasing energy production efficiency. Wind turbine rotor blades are becoming significantly more flexible and have an increased risk of structural failure. Thicker airfoil profiles can be used to increase the structural strength. However, thicker airfoils are more prone to flow separation with adverse effect on power generation. Vortex generators (VGs) are an effective solution to delay flow separation. However, VGs significantly increase radiated noise levels. This presented research experimentally investigates the effect of VGs on blade noise production. Specifically, the influence of the VG geometric shape is evaluated while keeping the dimensions constant. Wind tunnel tests have been carried out on a NACA 0018 that is equipped with triangular vane-type VGs specifically designed for the test conditions. A microphone phased array is used to assess the radiated noise using the beamforming technique. The results show that the VGs significantly contribute to increase the blade noise production with having a predominant role at high-frequencies where the VG acts as a non-compact aeroacoustic source.

Original languageEnglish
Title of host publication2018 AIAA/CEAS Aeroacoustics Conference
Place of PublicationReston, Virginia
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
ISBN (Electronic)978-1-62410-560-9
ISBN (Print)978-1-62410-560-9
DOIs
Publication statusE-pub ahead of print/First online - 24 Jun 2018
Event24th AIAA/CEAS Aeroacoustics Conference 2018 - Atlanta, United States
Duration: 25 Jun 201829 Jun 2018
Conference number: 24

Conference

Conference24th AIAA/CEAS Aeroacoustics Conference 2018
Abbreviated titleAeroacoustics 2018
CountryUnited States
CityAtlanta
Period25/06/1829/06/18

Fingerprint

Wind turbines
Vortex flow
Flow separation
Airfoils
Aeroacoustics
Microphones
Beamforming
Wind power
Turbomachine blades
Wind tunnels
Power generation
Rotors
Industry

Cite this

Kolkman, D., de Santana, L. D., van Garrel, A., Venner, C. H., León, A. A., & Sanders, M. P. J. (2018). Experimental characterization of vortex generators induced noise of wind turbines. In 2018 AIAA/CEAS Aeroacoustics Conference [AIAA 2018-2800] Reston, Virginia: American Institute of Aeronautics and Astronautics Inc. (AIAA). https://doi.org/10.2514/6.2018-2800
Kolkman, Dennis ; de Santana, Leandro D. ; van Garrel, Arne ; Venner, Cornelis H. ; León, Arlos Arce ; Sanders, Martinus P.J. / Experimental characterization of vortex generators induced noise of wind turbines. 2018 AIAA/CEAS Aeroacoustics Conference. Reston, Virginia : American Institute of Aeronautics and Astronautics Inc. (AIAA), 2018.
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abstract = "The wind energy industry is progressively aiming towards larger wind turbine size as a means of increasing energy production efficiency. Wind turbine rotor blades are becoming significantly more flexible and have an increased risk of structural failure. Thicker airfoil profiles can be used to increase the structural strength. However, thicker airfoils are more prone to flow separation with adverse effect on power generation. Vortex generators (VGs) are an effective solution to delay flow separation. However, VGs significantly increase radiated noise levels. This presented research experimentally investigates the effect of VGs on blade noise production. Specifically, the influence of the VG geometric shape is evaluated while keeping the dimensions constant. Wind tunnel tests have been carried out on a NACA 0018 that is equipped with triangular vane-type VGs specifically designed for the test conditions. A microphone phased array is used to assess the radiated noise using the beamforming technique. The results show that the VGs significantly contribute to increase the blade noise production with having a predominant role at high-frequencies where the VG acts as a non-compact aeroacoustic source.",
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Kolkman, D, de Santana, LD, van Garrel, A, Venner, CH, León, AA & Sanders, MPJ 2018, Experimental characterization of vortex generators induced noise of wind turbines. in 2018 AIAA/CEAS Aeroacoustics Conference., AIAA 2018-2800, American Institute of Aeronautics and Astronautics Inc. (AIAA), Reston, Virginia, 24th AIAA/CEAS Aeroacoustics Conference 2018, Atlanta, United States, 25/06/18. https://doi.org/10.2514/6.2018-2800

Experimental characterization of vortex generators induced noise of wind turbines. / Kolkman, Dennis; de Santana, Leandro D.; van Garrel, Arne; Venner, Cornelis H.; León, Arlos Arce; Sanders, Martinus P.J.

2018 AIAA/CEAS Aeroacoustics Conference. Reston, Virginia : American Institute of Aeronautics and Astronautics Inc. (AIAA), 2018. AIAA 2018-2800.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Kolkman D, de Santana LD, van Garrel A, Venner CH, León AA, Sanders MPJ. Experimental characterization of vortex generators induced noise of wind turbines. In 2018 AIAA/CEAS Aeroacoustics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics Inc. (AIAA). 2018. AIAA 2018-2800 https://doi.org/10.2514/6.2018-2800