CFD simulation of a 2 bladed multi megawatt wind turbine with flexible rotor connection

An innovative passive load reduction concept for a two bladed 3.4 MW wind turbine is investigated by a conjoint CFD and MBS - BEM methodology. The concept consists of a flexible hub mount which allows a tumbling motion of the rotor. First, the system is simulated with a MBS tool coupled to a BEM cod...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 753; no. 2; pp. 22010 - 22018
Main Authors Klein, L, Luhmann, B, Rösch, K-N, Lutz, T, Cheng, P-W, Krämer, E
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.09.2016
Subjects
Physics
Reduction
Rotors
Simulation
Tumbling motion
Wind turbines
Yaw
Yawing moments
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Summary:An innovative passive load reduction concept for a two bladed 3.4 MW wind turbine is investigated by a conjoint CFD and MBS - BEM methodology. The concept consists of a flexible hub mount which allows a tumbling motion of the rotor. First, the system is simulated with a MBS tool coupled to a BEM code. Then, the resulting motion of the rotor is extracted from the simulation and applied on the CFD simulation as prescribed motion. The aerodynamic results show a significant load reduction on the support structure. Hub pitching and yawing moment amplitudes are reduced by more than 50% in a vertically sheared inflow. Furthermore, the suitability of the MBS - BEM approach for the simulation of the load reduction system is shown.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/753/2/022010