The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind Turbines
The article aims to solve the problem of noise optimization of small wind turbines. The detailed analysis concentrates on accurate specification and prediction of the turbulent boundary layer noise spectrum of the blade airfoil. The angles of attack prediction for a horizontal axis wind turbine (HAW...
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| Format: | Article |
| Language: | English |
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Institute of Fundamental Technological Research Polish Academy of Sciences
2016-11-01
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| Series: | Archives of Acoustics |
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| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/1602 |
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| author | Nadiia AFANASIEVA |
| author_facet | Nadiia AFANASIEVA |
| author_sort | Nadiia AFANASIEVA |
| collection | DOAJ |
| description | The article aims to solve the problem of noise optimization of small wind turbines. The detailed analysis concentrates on accurate specification and prediction of the turbulent boundary layer noise spectrum of the blade airfoil. The angles of attack prediction for a horizontal axis wind turbine (HAWT) and the estimation based on literature data for a vertical axis one (VAWT), were conducted, and the influence on the noise spectrum was considered. The 1/3-octave sound pressure levels are obtained by semi-empirical model BPM. Resulting contour plots show a fundamental difference in the spectrum of HAWT and VAWT reflecting the two aerodynamic modes of flow that predefine the airfoil self-noise. Comparing the blade elements with a local radius of 0.875 m in the HAWT and VAWT conditions the predicted sound pressure levels are the 78.5 dB and 89.8 dB respectively. In case of the HAWT with predicted local angle of attack ranging from 2.98◦ to 4.63◦, the acoustic spectrum will vary primarily within broadband frequency band 1.74–20 kHz. For the VAWT with the local angle of attack ranging from 4◦ to 20◦ the acoustic spectrum varies within low and broadband frequency bands 2 Hz – 20 kHz. |
| format | Article |
| id | doaj-art-38ce12d81a0b4bf2850f3d46fde656a4 |
| institution | DOAJ |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2016-11-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-38ce12d81a0b4bf2850f3d46fde656a42025-08-20T03:16:00ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2016-11-0142110.1515/aoa-2017-0009The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind TurbinesNadiia AFANASIEVA0Don State Technical UniversityThe article aims to solve the problem of noise optimization of small wind turbines. The detailed analysis concentrates on accurate specification and prediction of the turbulent boundary layer noise spectrum of the blade airfoil. The angles of attack prediction for a horizontal axis wind turbine (HAWT) and the estimation based on literature data for a vertical axis one (VAWT), were conducted, and the influence on the noise spectrum was considered. The 1/3-octave sound pressure levels are obtained by semi-empirical model BPM. Resulting contour plots show a fundamental difference in the spectrum of HAWT and VAWT reflecting the two aerodynamic modes of flow that predefine the airfoil self-noise. Comparing the blade elements with a local radius of 0.875 m in the HAWT and VAWT conditions the predicted sound pressure levels are the 78.5 dB and 89.8 dB respectively. In case of the HAWT with predicted local angle of attack ranging from 2.98◦ to 4.63◦, the acoustic spectrum will vary primarily within broadband frequency band 1.74–20 kHz. For the VAWT with the local angle of attack ranging from 4◦ to 20◦ the acoustic spectrum varies within low and broadband frequency bands 2 Hz – 20 kHz.https://acoustics.ippt.pan.pl/index.php/aa/article/view/1602wind turbineairfoil self-noiseturbulent boundary layerflow conditionsangle of attack |
| spellingShingle | Nadiia AFANASIEVA The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind Turbines Archives of Acoustics wind turbine airfoil self-noise turbulent boundary layer flow conditions angle of attack |
| title | The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind Turbines |
| title_full | The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind Turbines |
| title_fullStr | The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind Turbines |
| title_full_unstemmed | The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind Turbines |
| title_short | The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind Turbines |
| title_sort | effect of angle of attack and flow conditions on turbulent boundary layer noise of small wind turbines |
| topic | wind turbine airfoil self-noise turbulent boundary layer flow conditions angle of attack |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/1602 |
| work_keys_str_mv | AT nadiiaafanasieva theeffectofangleofattackandflowconditionsonturbulentboundarylayernoiseofsmallwindturbines AT nadiiaafanasieva effectofangleofattackandflowconditionsonturbulentboundarylayernoiseofsmallwindturbines |