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Aerodynamic Analysis of a Wind-Turbine Rotor Affected by Pitch Unbalance
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- Castellani, Francesco (author)
- Univ Perugia, Dept Engn, Via G Durand 93, I-06125 Perugia, Italy.
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- Eltayesh, Abdelgalil (author)
- Benha Univ, Benha Fac Engn, Mech Engn Dept, Banha 13512, Egypt.
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- Becchetti, Matteo (author)
- Univ Perugia, Dept Engn, Via G Durand 93, I-06125 Perugia, Italy.
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- Univ Perugia, Dept Engn, Via G Durand 93, I-06125 Perugia, Italy Benha Univ, Benha Fac Engn, Mech Engn Dept, Banha 13512, Egypt. (creator_code:org_t)
- 2021-01-31
- 2021
- English.
- In: Energies. - : MDPI AG. - 1996-1073. ; 14:3
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The aerodynamics of a rotor with pitch imbalance has been investigated experimentally and numerically in the present work. The comparison of mean velocity and turbulence intensity in the balanced and unbalanced cases indicated that a pitch imbalance modifies both the mean velocity and the turbulent activity; the latter is weakly increased by the imbalance. Spectral analysis indicated that the dynamics of the wake is also affected by the pitch imbalance since the tip vortices loose strength and disorganise more quickly than in the balanced case. The pitch imbalance has, however, a detrimental effect on the power coefficient and it affects the thrust coefficient as well. Only the blade affected by the imbalance shows significant modifications of the applied load, while the other blades operate with the same loading conditions.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Keyword
- rotor aerodynamics
- pitch imbalance
- wind-tunnel test
- CFD
Publication and Content Type
- ref (subject category)
- art (subject category)
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