Spatio-temporal koopman decomposition in offshore wind turbines

Soledad Le Clainche*, Xuerui Mao, José M. Vega

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

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 languageEnglish
Publication statusPublished - 2017
Externally publishedYes
Event17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017 - Maui, United States
Duration: 16 Dec 201721 Dec 2017

Conference

Conference17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017
Country/TerritoryUnited States
CityMaui
Period16/12/1721/12/17

Keywords

  • DMD
  • Flow structures
  • HODMD
  • Koopman modes
  • STKD
  • Wind turbines

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Le Clainche, S., Mao, X., & Vega, J. M. (2017). Spatio-temporal koopman decomposition in offshore wind turbines. Paper presented at 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2017, Maui, United States.