Abstract
This article presents the spatio-temporal analysis of the flow structures in the wake of an offshore wind turbine using spatio-temporal Koopman decomposition (STKD). STKD is a new method that obtains and combines the main frequencies and wavenumbers (characterizing a specific spatial direction) contained in a flow, with the aim at representing the main flow structures as a whole of traveling waves. The results obtained show that the complex behaviour of the wake of the wind turbine is mainly driven by a single traveling wave moving downstream and a combination of small amplitude traveling waves, related to velocity fluctuations, that represent the flow rotation.
Original language | English |
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Publication status | Published - 2017 |
Externally published | Yes |
Event | 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017 - Maui, United States Duration: 16 Dec 2017 → 21 Dec 2017 |
Conference
Conference | 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017 |
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Country/Territory | United States |
City | Maui |
Period | 16/12/17 → 21/12/17 |
Keywords
- DMD
- Flow structures
- HODMD
- Koopman modes
- STKD
- Wind turbines