Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades

Broadband noise generation from wind turbine blades is one of the fundamental aspects of flow-induced noise. Besides the turbulent boundary layer flow over the blades, factors such as the angle of attack, the turbulence intensity, the trailing edge thickness of the blade and their shapes strongly in...

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Autores principales:	Satya Prasad MADDULA, Vasishta Bhargava NUKALA, Venkata Swamy Naidu NEIGAPULA
Formato:	article
Lenguaje:	EN
Publicado:	National Institute for Aerospace Research “Elie Carafoli” - INCAS 2021
Materias:	sound power level blade wind turbine turbulent boundary layer wind speed Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doaj.org/article/cb824b2316bc4382a9c2e1453e392e0f
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id	oai:doaj.org-article:cb824b2316bc4382a9c2e1453e392e0f
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spelling	oai:doaj.org-article:cb824b2316bc4382a9c2e1453e392e0f2021-12-05T21:18:31ZTrailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades10.13111/2066-8201.2021.13.4.92066-82012247-4528https://doaj.org/article/cb824b2316bc4382a9c2e1453e392e0f2021-12-01T00:00:00Zhttps://bulletin.incas.ro/files/maddula__nukala__neigapula__vol_13_iss_4.pdfhttps://doaj.org/toc/2066-8201https://doaj.org/toc/2247-4528Broadband noise generation from wind turbine blades is one of the fundamental aspects of flow-induced noise. Besides the turbulent boundary layer flow over the blades, factors such as the angle of attack, the turbulence intensity, the trailing edge thickness of the blade and their shapes strongly influence the overall sound power levels at high frequencies, i.e. f > 8 kHz. In large operating wind farms, a trade-off between noise generation and power production is considered by power utility firms to maximize the return on investment (ROI) and minimize the fatigue damage on wind turbine components. The present work deals with the analysis of the thickness effect on trailing edge bluntness noise level at hub height average wind speeds of 7 m/s, 10 m/s. A semi-empirical BPM model was used to predict the sound pressure levels from the 37 m blade length of a 2MW wind turbine. The receiver configuration was fixed at a distance of 120 m from the source height of 80 m. The results demonstrated that as the trailing edge height increased from 0.1 % to 0.5 % of the local chord, the sound power level increased by ~ 17 dB for frequencies > 200 Hz, but decreased by 16 dB when the thickness is 0.1 % local chord. The computed results of the sound power level using the BPM model have been validated using experimental data and showed a good agreement for the tonal frequencies, f ~ 10 kHz, where the trailing edge bluntness noise becomes dominant.Satya Prasad MADDULAVasishta Bhargava NUKALAVenkata Swamy Naidu NEIGAPULANational Institute for Aerospace Research “Elie Carafoli” - INCASarticlesound power levelbladewind turbineturbulent boundary layerwind speedMotor vehicles. Aeronautics. AstronauticsTL1-4050ENINCAS Bulletin, Vol 13, Iss 4, Pp 99-111 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sound power level blade wind turbine turbulent boundary layer wind speed Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	sound power level blade wind turbine turbulent boundary layer wind speed Motor vehicles. Aeronautics. Astronautics TL1-4050 Satya Prasad MADDULA Vasishta Bhargava NUKALA Venkata Swamy Naidu NEIGAPULA Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades
description	Broadband noise generation from wind turbine blades is one of the fundamental aspects of flow-induced noise. Besides the turbulent boundary layer flow over the blades, factors such as the angle of attack, the turbulence intensity, the trailing edge thickness of the blade and their shapes strongly influence the overall sound power levels at high frequencies, i.e. f > 8 kHz. In large operating wind farms, a trade-off between noise generation and power production is considered by power utility firms to maximize the return on investment (ROI) and minimize the fatigue damage on wind turbine components. The present work deals with the analysis of the thickness effect on trailing edge bluntness noise level at hub height average wind speeds of 7 m/s, 10 m/s. A semi-empirical BPM model was used to predict the sound pressure levels from the 37 m blade length of a 2MW wind turbine. The receiver configuration was fixed at a distance of 120 m from the source height of 80 m. The results demonstrated that as the trailing edge height increased from 0.1 % to 0.5 % of the local chord, the sound power level increased by ~ 17 dB for frequencies > 200 Hz, but decreased by 16 dB when the thickness is 0.1 % local chord. The computed results of the sound power level using the BPM model have been validated using experimental data and showed a good agreement for the tonal frequencies, f ~ 10 kHz, where the trailing edge bluntness noise becomes dominant.
format	article
author	Satya Prasad MADDULA Vasishta Bhargava NUKALA Venkata Swamy Naidu NEIGAPULA
author_facet	Satya Prasad MADDULA Vasishta Bhargava NUKALA Venkata Swamy Naidu NEIGAPULA
author_sort	Satya Prasad MADDULA
title	Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades
title_short	Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades
title_full	Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades
title_fullStr	Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades
title_full_unstemmed	Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades
title_sort	trailing edge thickness effect on tonal noise emission characteristics from wind turbine blades
publisher	National Institute for Aerospace Research “Elie Carafoli” - INCAS
publishDate	2021
url	https://doaj.org/article/cb824b2316bc4382a9c2e1453e392e0f
work_keys_str_mv	AT satyaprasadmaddula trailingedgethicknesseffectontonalnoiseemissioncharacteristicsfromwindturbineblades AT vasishtabhargavanukala trailingedgethicknesseffectontonalnoiseemissioncharacteristicsfromwindturbineblades AT venkataswamynaiduneigapula trailingedgethicknesseffectontonalnoiseemissioncharacteristicsfromwindturbineblades
_version_	1718371031467425792

Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades

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