How does turbulence change approaching a rotor?

Mann, Jakob; Peña, Alfredo; Troldborg, Niels; Andersen, Søren J.

doi:https://doi.org/10.5194/wes-3-293-2018

Articles | Volume 3, issue 1

https://doi.org/10.5194/wes-3-293-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Wind Energy Science Conference 2017

https://doi.org/10.5194/wes-3-293-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 3, issue 1

Research article

|

24 May 2018

Research article |

| 24 May 2018

How does turbulence change approaching a rotor?

Jakob Mann, Alfredo Peña, Niels Troldborg, and Søren J. Andersen

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Final revised paper (published on 24 May 2018)
Preprint (discussion started on 28 Nov 2017)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

SC1: 'Rotation of the inflow in front of the rotor', Mads Pedersen, 07 Dec 2017
RC1: 'How does turbulence change approaching a rotor?', Mike Graham, 18 Dec 2017
SC2: 'Figure 7', Alexander Meyer Forsting, 09 Jan 2018
RC2: 'Review 1', Anonymous Referee #2, 24 Feb 2018
AC1: 'Author reply to all reviews and comment', Jakob Mann, 23 Apr 2018

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Jakob Mann on behalf of the Authors (25 Apr 2018) Author's response Manuscript

ED: Publish as is (07 May 2018) by Jens Nørkær Sørensen

ED: Publish as is (07 May 2018) by Joachim Peinke (Chief editor)

AR by Jakob Mann on behalf of the Authors (08 May 2018)

Short summary

Turbulence is usually assumed to be unmodified by the stagnation occurring in front of a wind turbine rotor. All manufacturers assume this in their dynamic load calculations. If this assumption is not true it might bias the load calculations and the turbines might not be designed optimally. We investigate the assumption with a Doppler lidar measuring forward from the top of the nacelle and find small but systematic changes in the approaching turbulence that depend on the power curve.