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New method to capture traveling waves in flow passing a wind turbine

Le Clainche, Soledad; Mao, Xuerui; Vega, Jos� M.

Authors

Soledad Le Clainche

Xuerui Mao

Jos� M. Vega



Abstract

© 2019 John Wiley & Sons, Ltd. Flow structures in the wake of a wind turbine are analysed by performing spatio-temporal Koopman decomposition (STKD). STKD is a new method to decompose the flow field as a combination of travelling waves and to extract the frequency and wavenumbers (characterizing a specific spatial direction) of the dominant waves. The results indicate that the complex unsteady behaviour of the turbine wake flow is mainly driven by a single wave travelling downstream, combined with smaller amplitude traveling waves representing the flow rotation. This result agrees with the general description of the wake of a wind turbine regarded as the combination of self-sustained oscillations and the development of upstream external noise, which are represented by the dominant traveling wave and the small-magnitude ones, respectively.

Citation

Le Clainche, S., Mao, X., & Vega, J. M. (2019). New method to capture traveling waves in flow passing a wind turbine. Wind Energy, 22(7), 922-931. https://doi.org/10.1002/we.2331

Journal Article Type Article
Acceptance Date Feb 11, 2019
Online Publication Date Mar 19, 2019
Publication Date Jul 1, 2019
Deposit Date Nov 18, 2019
Publicly Available Date Mar 28, 2024
Journal Wind Energy
Print ISSN 1095-4244
Electronic ISSN 1099-1824
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 22
Issue 7
Pages 922-931
DOI https://doi.org/10.1002/we.2331
Keywords Renewable Energy, Sustainability and the Environment
Public URL https://nottingham-repository.worktribe.com/output/3324535
Publisher URL https://onlinelibrary.wiley.com/doi/full/10.1002/we.2331