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Stability analysis of the tip vortices of a wind turbine
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. Gotland University, Sweden.
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-7864-3071
2008 (English)In: 46th AIAA Aerospace Sciences Meeting and Exhibit, 2008Conference paper, Published paper (Refereed)
Abstract [en]

The aim of the present project is to get a better understanding of the stability properties of wakes generated by wind turbine rotors. To determine the stability properties of wind turbine wakes a numerical study on the stability of the tip vortices behind the Tjaereborg wind turbine has been carried out. The numerical model is based on large eddy simulations of the Navier-Stokes equations using the actuator line method to generate the wake and the tip vortices. To determine critical frequencies the flow is perturbed by inserting a harmonic perturbation. The results show that the instability is dispersive and that growth arise only for some specific frequencies and type of modes.

Place, publisher, year, edition, pages
2008.
Keyword [en]
Critical frequencies, Harmonic perturbations, Numerical models, Numerical studies, Specific frequencies, Stability analysis, Stability properties, Tip vortex, Wind turbine rotors, Wind turbine wakes, Aerodynamics, Aerospace engineering, Computer simulation, Flow control, Navier Stokes equations, Wakes, Wind power, Wind tunnels, Wind turbines, Stability
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-153987Scopus ID: 2-s2.0-78149442902ISBN: 9781563479373 (print)OAI: oai:DiVA.org:kth-153987DiVA: diva2:761646
Conference
46th AIAA Aerospace Sciences Meeting and Exhibit, 7 January 2008 through 10 January 2008, Reno, NV, United States
Note

QC 20141107

Available from: 2014-11-07 Created: 2014-10-10 Last updated: 2014-11-07Bibliographically approved

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Henningson, Dan Stefan

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf