ECN publication
Numerical Study on Performance of Curved Wind Turbine Blade for Loads Reduction
Maggio, T.; Grasso, F.; Coiro, D.P.
Published by: Publication date:
ECN Wind Energy 19-7-2011
ECN report number: Document type:
ECN-M--11-072 Conference Paper
Number of pages: Full text:
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Nowadays, the wind turbines are becoming larger and larger. This is mainly due to the fact that the power is increasing with the rotor area. At the same time, however, the weight is in-creasing and so, the cost. Technological innovation is fundamental in this development to keep the cost low while the size of the turbines is increasing. The crucial step is to keep the loads low. Several solutions are in development. The present work is focused on a numerical investigation about the performances of swept-blade wind turbine rotors. There is an increased interest in the study of swept-blade wind turbine rotors in order to in-crease energy capture without an increase in the turbine loads; at the same time, a swept-blade geometry is less sensitive to wind gusts and so, more tolerant for fatigue loads. A code devel-oped at ECN, based on the generalized lifting line theory and coupled with a free wake method, was used. The code has been extended in order to take into account the deformation of the blade due to torsion and bending moments. In the next paragraph, the code is presented. Then, the results of parametric analyses are illustrated and discussed. This research is also including analyses in extreme gusts conditions and considerations about performances and noise

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