Wind tunnel tests of a free yawing downwind wind turbine

The Science of Making Torque from Wind 2012

Verelst, D.R.S.^1 ; Larsen, T.J.^1 ; Van Wingerden, J.W.^2

DTU Wind Energy, Denmark^1

TU Delft, Denmark^2

关键词: Aero-elastic simulations;    Behavioural studies;    Flexible blades;    Open jet facilities;    Research papers;    Support structures;    Technical details;    Wind tunnel tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/555/1/012103/pdf
DOI  :  10.1088/1742-6596/555/1/012103

来源: IOP

【 摘 要 】

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.