Journal cover Journal topic
Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
Journal topic

Journal metrics

CiteScore value: 0.6
CiteScore
0.6
h5-index value: 13
h5-index13
Preprints
https://doi.org/10.5194/wes-2020-111
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-111
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  26 Oct 2020

26 Oct 2020

Review status
This preprint is currently under review for the journal WES.

Wake redirection at higher axial induction

Carlo Cossu Carlo Cossu
  • Laboratoire d’Hydrodynamique Énergetique et Environnement Atmosphèrique (LHEEA) CNRS - Centrale Nantes, 1 rue de la Noë 44300 Nantes, France

Abstract. The energy produced by wind plants can be increased by mitigating the negative effects of turbine-wakes interactions. In this context, axial induction control and wake redirection, obtained by intentionally yawing or tilting the rotor axis away from the mean wind direction, have been the subject of extensive investigations. We have recently shown that the combination of static tilt control with static axial over-induction results in significant power gains. However, these early results were based on idealized turbine models where wake-rotation effects, radial force distributions and realistic turbine controller effects were neglected. In this study we therefore compute power gains that can be obtained by operating tilted rotors at higher axial induction for the more realistic native NREL 5-MW turbine model implemented in SOWFA. We then extend this approach to the case of yaw control. We show that power gains obtained by standard wake redirection based on yaw or tilt control are highly enhanced when the yawed or tilted turbines are operated at higher axial induction. These results confirm our early findings for the case of tilt control and extend them to the case of yaw control suggesting an high potential for the practical application of overinductive wake redirection.

Carlo Cossu

Interactive discussion

Status: open (until 07 Dec 2020)
Status: open (until 07 Dec 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Carlo Cossu

Carlo Cossu

Viewed

Total article views: 157 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
116 39 2 157 2 1
  • HTML: 116
  • PDF: 39
  • XML: 2
  • Total: 157
  • BibTeX: 2
  • EndNote: 1
Views and downloads (calculated since 26 Oct 2020)
Cumulative views and downloads (calculated since 26 Oct 2020)

Viewed (geographical distribution)

Total article views: 106 (including HTML, PDF, and XML) Thereof 106 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 01 Dec 2020
Publications Copernicus
Download
Short summary
In this study wake redirection and axial induction control are combined to mitigate turbine-wake interactions which have a negative impact on the performance and lifetime of wind farms. The result confirm in a realistic setting that substantial power gains are obtained when overinduction is combined with tilt control. More importantly, the approach is extended to the case of yaw control showing that large power gains enhancements are obtained by means of overinductive yaw control.
In this study wake redirection and axial induction control are combined to mitigate turbine-wake...
Citation