Advertisement

Comparison between Wind Tunnel and Field Experiments on Wind Turbine Wake Meandering

  • S. Aubrun
  • T. F. Tchouaké
  • G. España
  • G. Larsen
  • J. Mann
  • F. Bingöl
Part of the Springer Proceedings in Physics book series (SPPHY, volume 141)

Abstract

In order to determine the physics driving the wind turbine wake meandering process [4], a previous study has been performed in an atmospheric boundary layer wind tunnel focusing on the unsteady behaviour of a modelled wind turbine wake (i.e. physical modelling based on the actuator disc concept). It was proven that the presence of turbulent scales larger than the wind turbine diameter could be responsible for a random flapping of the whole wake (i.e. wake meandering) [2]. This is indeed the case in full-scale environments, since the large turbulent scales of the atmospheric boundary layer typically are several hundred meters, whereas the diameter of a modern wind turbine rotor is around one hundred meters. PIV measurements of the scaled wind turbine wakes have been performed, and a specific image processing technique enabled to determine the instantaneous deviations of the wake position from its time-average location, as well as the width of the instantaneous wake. The image processing technique originally applied was based on determination of the wake deficit borders through a velocity threshold applied on the instantaneous velocity fields.

Keywords

Wind Tunnel Wind Turbine Atmospheric Boundary Layer Image Processing Technique Turbulence Length Scale 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Bingöl, F., Mann, J., Larsen, G.C.: Light detection and ranging measurements of wake dynamics Part I: One-dimensional Scanning. Wind Energy 13, 51–61 (2010)CrossRefGoogle Scholar
  2. 2.
    España, G., Aubrun, S., Loyer, S., Devinant, P.: Spatial study of the wake meandering using modelled wind turbines in a wind tunnel. Wind Energy (2011), doi:10.1002/we.515Google Scholar
  3. 3.
    Hansen, K.S., Larsen, G.C., Enevoldsen, K., Mann, J.: LiDAR measurements of full scale wind turbine wake characteristics. In: Proceedings for Euromech Colloquium 508 on Wind Turbine Wakes, Madrid, Spain, October 20-22 (2009)Google Scholar
  4. 4.
    Larsen, G.C., Madsen, H.A., Thomsen, K., Larsen, T.J.: Wake meandering: a pragmatic approach. Wind Energy 11, 377–395 (2008)CrossRefGoogle Scholar
  5. 5.
    Trujillo, J.J., Bingöl, F., Larsen, G.C., Mann, J.: Light detection and ranging measurements on wake dynamics; Part II: Two-dimensional Scanning. Wind Energy 14, 61–75 (2010)CrossRefGoogle Scholar
  6. 6.
    VDI-guideline 3793/12. Physical modelling of flow and dispersion processes in the atmospheric boundary layer, application of wind tunnels. Beuth Verlag, Berlin (2000)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • S. Aubrun
    • 1
  • T. F. Tchouaké
    • 1
  • G. España
    • 1
  • G. Larsen
    • 2
  • J. Mann
    • 2
  • F. Bingöl
    • 2
  1. 1.Institut PRISMEUniversity of OrléansOrléansFrance
  2. 2.Risø-DTU National Laboratory for Sustainable EnergyRoskildeDenmark, UK

Personalised recommendations