Articles | Volume 6, issue 6
Wind Energ. Sci., 6, 1413–1425, 2021
https://doi.org/10.5194/wes-6-1413-2021
Wind Energ. Sci., 6, 1413–1425, 2021
https://doi.org/10.5194/wes-6-1413-2021

Research article 09 Nov 2021

Research article | 09 Nov 2021

Some effects of flow expansion on the aerodynamics of horizontal-axis wind turbines

David H. Wood and Eric J. Limacher

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2021-52', Gijs van Kuik, 06 Jul 2021
  • RC4: 'Comment on wes-2021-52', Emmanuel Branlard, 19 Jul 2021
  • AC1: 'Response to referee 1 wes-2021-52', David Wood, 25 Aug 2021
  • AC2: 'Response to referee 2 wes-2021-52', David Wood, 25 Aug 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by David Wood on behalf of the Authors (25 Aug 2021)  Author's response    Author's tracked changes
ED: Referee Nomination & Report Request started (11 Sep 2021) by Jens Nørkær Sørensen
RR by Gijs van Kuik (20 Sep 2021)
RR by Emmanuel Branlard (08 Oct 2021)
ED: Publish as is (09 Oct 2021) by Jens Nørkær Sørensen
ED: Publish subject to technical corrections (09 Oct 2021) by Jakob Mann(Chief Editor)
AR by David Wood on behalf of the Authors (17 Oct 2021)  Author's response    Manuscript
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Short summary
The airflow through a wind turbine must expand as it goes through the blades for them to extract energy from the wind. Expansion has not been properly incorporated in wind turbine aerodynamics. We show that the conventional equation for wind turbine thrust becomes inaccurate when the expansion is maximized to achieve maximum power, and expansion reduces power by around 6 %. We formulate equations for the disturbance of the external flow and show that this is maximized at the rotor plane.