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.
|Book series||Journal of Physics: Conference Series (Online)|
|Number of pages||7|
|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
|Conference||The science of Making Torque from Wind 2012|
|Period||09/10/2012 → 11/10/2012|