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Location of aerodyn...
Location of aerodynamic noise sources from a 200 kW vertical-axis wind turbine
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- Ottermo, Fredric, 1975- (author)
- Högskolan i Halmstad,Rydberglaboratoriet för tillämpad naturvetenskap (RLAS),Energy,Halmstad Univ, Rydberg Lab Appl Sci, POB 823, SE-30118 Halmstad, Sweden
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- Möllerström, Erik, 1984- (author)
- Uppsala universitet,Högskolan i Halmstad,Rydberglaboratoriet för tillämpad naturvetenskap (RLAS),Uppsala University, Uppsala, Sweden,Energy,Elektricitetslära,Halmstad Univ, Rydberg Lab Appl Sci, POB 823, SE-30118 Halmstad, Sweden
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- Nordborg, Anders (author)
- Sound View Instruments Hoby Gard, S-27636 Borrby, Sweden
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- Hylander, Jonny, 1955- (author)
- Högskolan i Halmstad,Rydberglaboratoriet för tillämpad naturvetenskap (RLAS),Energy,Halmstad Univ, Rydberg Lab Appl Sci, POB 823, SE-30118 Halmstad, Sweden
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- Bernhoff, Hans (author)
- Uppsala universitet,Elektricitetslära,Uppsala University, Uppsala, Sweden
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(creator_code:org_t)
- London : Elsevier, 2017
- 2017
- English.
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In: Journal of Sound and Vibration. - London : Elsevier. - 0022-460X .- 1095-8568. ; 400, s. 154-166
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Noise levels emitted from a 200 kW H-rotor vertical-axis wind turbine have been measured using a microphone array at four different positions, each at a hub-height distance from the tower. The microphone array, comprising 48 microphones in a spiral pattern, allows for directional mapping of the noise sources in the range of 500 Hz to 4 kHz. The produced images indicate that most of the noise is generated in a narrow azimuth-angle range, compatible with the location where increased turbulence is known to be present in the flow, as a result of the previous passage of a blade and its support arms. It is also shown that a semi-empirical model for inflow-turbulence noise seems to produce noise levels of the correct order of magnitude, based on the amount of turbulence that could be expected from power extraction considerations.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Keyword
- Vertical-axis wind turbine
- H-rotor
- Noise
- Microphone array
- Beamforming
Publication and Content Type
- ref (subject category)
- art (subject category)
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