Wind tunnel tests of a free yawing downwind wind turbine

David Robert Verelst; Torben J. Larsen; Jan-Willem van Wingerden

doi:10.1088/1742-6596/555/1/012103

Wind tunnel tests of a free yawing downwind wind turbine

David Robert Verelst, Torben J. Larsen, Jan-Willem van Wingerden

Delft University of Technology

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Abstract

This research paper presents preliminary results on a behavioural study of a free yawing downwind wind turbine. A series of wind tunnel tests was performed at the TU Delft Open Jet Facility with a three bladed downwind wind turbine and a rotor radius of 0.8 meters. The setup includes an off the shelf three bladed hub, nacelle and generator on which relatively flexible blades are mounted. The tower support structure has free yawing capabilities provided at the base. A short overview on the technical details of the experiment is given as well as a brief summary of the design process. The discussed test cases show that the turbine is stable while operating in free yawing conditions. Further, the effect of the tower shadow passage on the blade flapwise strain measurement is evaluated. Finally, data from the experiment is compared with preliminary simulations using DTU Wind Energy's aeroelastic simulation program HAWC2.

Original language	English
Article number	012103
Book series	Journal of Physics: Conference Series (Online)
Volume	555
Number of pages	7
ISSN	1742-6596
DOIs	https://doi.org/10.1088/1742-6596/555/1/012103
Publication status	Published - 2014
Event	The science of Making Torque from Wind 2012: 4th scientific conference - Universität Oldenburg, Oldenburg, Germany Duration: 9 Oct 2012 → 11 Oct 2012 http://www.forwind.de/makingtorque/Home.html

Conference

Conference	The science of Making Torque from Wind 2012
Location	Universität Oldenburg
Country/Territory	Germany
City	Oldenburg
Period	09/10/2012 → 11/10/2012
Internet address	http://www.forwind.de/makingtorque/Home.html

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Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

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title = "Wind tunnel tests of a free yawing downwind wind turbine",

abstract = "This research paper presents preliminary results on a behavioural study of a free yawing downwind wind turbine. A series of wind tunnel tests was performed at the TU Delft Open Jet Facility with a three bladed downwind wind turbine and a rotor radius of 0.8 meters. The setup includes an off the shelf three bladed hub, nacelle and generator on which relatively flexible blades are mounted. The tower support structure has free yawing capabilities provided at the base. A short overview on the technical details of the experiment is given as well as a brief summary of the design process. The discussed test cases show that the turbine is stable while operating in free yawing conditions. Further, the effect of the tower shadow passage on the blade flapwise strain measurement is evaluated. Finally, data from the experiment is compared with preliminary simulations using DTU Wind Energy's aeroelastic simulation program HAWC2.",

author = "Verelst, {David Robert} and Larsen, {Torben J.} and {van Wingerden}, Jan-Willem",

note = "Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd; The science of Making Torque from Wind 2012 : 4th scientific conference ; Conference date: 09-10-2012 Through 11-10-2012",

year = "2014",

doi = "10.1088/1742-6596/555/1/012103",

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AU - Larsen, Torben J.

AU - van Wingerden, Jan-Willem

N1 - Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd

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N2 - This research paper presents preliminary results on a behavioural study of a free yawing downwind wind turbine. A series of wind tunnel tests was performed at the TU Delft Open Jet Facility with a three bladed downwind wind turbine and a rotor radius of 0.8 meters. The setup includes an off the shelf three bladed hub, nacelle and generator on which relatively flexible blades are mounted. The tower support structure has free yawing capabilities provided at the base. A short overview on the technical details of the experiment is given as well as a brief summary of the design process. The discussed test cases show that the turbine is stable while operating in free yawing conditions. Further, the effect of the tower shadow passage on the blade flapwise strain measurement is evaluated. Finally, data from the experiment is compared with preliminary simulations using DTU Wind Energy's aeroelastic simulation program HAWC2.

AB - This research paper presents preliminary results on a behavioural study of a free yawing downwind wind turbine. A series of wind tunnel tests was performed at the TU Delft Open Jet Facility with a three bladed downwind wind turbine and a rotor radius of 0.8 meters. The setup includes an off the shelf three bladed hub, nacelle and generator on which relatively flexible blades are mounted. The tower support structure has free yawing capabilities provided at the base. A short overview on the technical details of the experiment is given as well as a brief summary of the design process. The discussed test cases show that the turbine is stable while operating in free yawing conditions. Further, the effect of the tower shadow passage on the blade flapwise strain measurement is evaluated. Finally, data from the experiment is compared with preliminary simulations using DTU Wind Energy's aeroelastic simulation program HAWC2.

U2 - 10.1088/1742-6596/555/1/012103

DO - 10.1088/1742-6596/555/1/012103

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VL - 555

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JF - Journal of Physics: Conference Series (Online)

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T2 - The science of Making Torque from Wind 2012

Y2 - 9 October 2012 through 11 October 2012

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Wind tunnel tests of a free yawing downwind wind turbine

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