抄録
Downwind rotors are a promising concept for multi-megawatt scale large wind turbines due to their advantages in safety and cost reduction. However, they have risks from impulsive loads when one of the blades passes across the tower wake, where the wind speed is lower and locally turbulent. Although the tower shadow effects on the tower loads have been discussed in former studies, there is currently no appropriate model for the blade-element and momentum theory so far. This study formulates the tower shadow effects on the tower load variation induced by blades using the lifting line theory, which does not require any empirical parameters. The method is verified via computational fluid dynamics for a 2 MW(megawatt), 3-bladed downwind turbine. The amplitude and the phase of the variation are shown to be accurate in outboard sections, where the rotor-tower clearance is large (>3.0 times of the tower diameter) and the ratio of the blade chord length is small (<0.5 times of the tower diameter), in both of rated and cut-out conditions.
| 元の言語 | 英語 |
|---|---|
| 記事番号 | 2521 |
| ジャーナル | Energies |
| 巻 | 11 |
| 発行部数 | 10 |
| DOI | |
| 出版物ステータス | 出版済み - 10 2018 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Energy (miscellaneous)
- Control and Optimization
- Electrical and Electronic Engineering
これを引用
Combined blade-element momentum-lifting line model for variable loads on downwind turbine towers. / Yoshida, Shigeo.
：: Energies, 巻 11, 番号 10, 2521, 10.2018.研究成果: ジャーナルへの寄稿 › 記事
}
TY - JOUR
T1 - Combined blade-element momentum-lifting line model for variable loads on downwind turbine towers
AU - Yoshida, Shigeo
PY - 2018/10
Y1 - 2018/10
N2 - Downwind rotors are a promising concept for multi-megawatt scale large wind turbines due to their advantages in safety and cost reduction. However, they have risks from impulsive loads when one of the blades passes across the tower wake, where the wind speed is lower and locally turbulent. Although the tower shadow effects on the tower loads have been discussed in former studies, there is currently no appropriate model for the blade-element and momentum theory so far. This study formulates the tower shadow effects on the tower load variation induced by blades using the lifting line theory, which does not require any empirical parameters. The method is verified via computational fluid dynamics for a 2 MW(megawatt), 3-bladed downwind turbine. The amplitude and the phase of the variation are shown to be accurate in outboard sections, where the rotor-tower clearance is large (>3.0 times of the tower diameter) and the ratio of the blade chord length is small (<0.5 times of the tower diameter), in both of rated and cut-out conditions.
AB - Downwind rotors are a promising concept for multi-megawatt scale large wind turbines due to their advantages in safety and cost reduction. However, they have risks from impulsive loads when one of the blades passes across the tower wake, where the wind speed is lower and locally turbulent. Although the tower shadow effects on the tower loads have been discussed in former studies, there is currently no appropriate model for the blade-element and momentum theory so far. This study formulates the tower shadow effects on the tower load variation induced by blades using the lifting line theory, which does not require any empirical parameters. The method is verified via computational fluid dynamics for a 2 MW(megawatt), 3-bladed downwind turbine. The amplitude and the phase of the variation are shown to be accurate in outboard sections, where the rotor-tower clearance is large (>3.0 times of the tower diameter) and the ratio of the blade chord length is small (<0.5 times of the tower diameter), in both of rated and cut-out conditions.
UR - http://www.scopus.com/inward/record.url?scp=85056140671&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85056140671&partnerID=8YFLogxK
U2 - 10.3390/en11102521
DO - 10.3390/en11102521
M3 - Article
AN - SCOPUS:85056140671
VL - 11
JO - Energies
JF - Energies
SN - 1996-1073
IS - 10
M1 - 2521
ER -