Articles | Volume 4, issue 2
Wind Energ. Sci., 4, 233–250, 2019
Wind Energ. Sci., 4, 233–250, 2019

Research article 15 May 2019

Research article | 15 May 2019

Qualitative yaw stability analysis of free-yawing downwind turbines

Gesine Wanke et al.


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Gesine Wanke on behalf of the Authors (15 Feb 2019)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (07 Mar 2019) by Carlo L. Bottasso
RR by Vasilis A. Riziotis (27 Mar 2019)
ED: Publish as is (27 Mar 2019) by Carlo L. Bottasso
ED: Publish as is (25 Apr 2019) by Carlo L. Bottasso(Chief Editor)
Short summary
In this paper the results of the stability analysis of a free-yawing downwind turbine are shown and the turbine's ability to align the rotor passively with the wind direction is investigated. The results show that a tilt angle causes the equilibrium yaw position of free-yawing downwind to be non-zero. It is shown that an increase in cone angle can stabilize the free-yaw mode significantly, while blade flapwise flexibility will increase the risk of an instability of the free-yaw mode.