Design_of_wind_turbines - Module 1.3 Design of wind...

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Design of wind turbines Kenneth Thomsen and Niels-Erik Clausen Risø National Laboratory Training program in wind energy and project development Phuket, 11-15 September 2006 Module 1.3 Wind Energy Course, Phuket, 11-15 Sept 2006 2 Contents Wind turbine loads (physics and modeling) Wind Aerodynamics Structural dynamics Aeroelasticity Control principles Design Basis and standard IEC61400-1
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Wind Energy Course, Phuket, 11-15 Sept 2006 3 physics modeling Atmospheric physics Wind power meteorology (WAsP, WAsP Engineering) Computational Fluid Dynamics Aeroelasticity Structural dynamics Experimental verification Design methods New concepts Certification Wind Energy Course, Phuket, 11-15 Sept 2006 4 Methods for establishing design loads Experimental (prototype testing) Rules of thumb – based on experience Load paradigm e.g. simplified load basis in the wind turbine code DS472 ( 1st Danish type approval, late 1970ies) Aeroelastic frequency domain models e.g. DesignBasis 1 Aeroelastic time domain models FLEX5 (Stig Øye, DTU) HAWC (Risø) Bladed (Garrad Hassan) PHATAS (ECN, nl), VIDYN (Teknikgruppen, s), ALCYONE (CRES, gr)
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Wind Energy Course, Phuket, 11-15 Sept 2006 5 Wind and turbulence in aeroelastic models Wind Energy Course, Phuket, 11-15 Sept 2006 6 Mean wind and turbulence Mean wind WAsP • Hub center wind speed • Wind shear • Wind direction • Slope of mean wind Turbulence WAsP Eng • Intensity in u-direction • Relative intensity in v- and w- directions • Pre-calculated turbulence time series used for calc [std(U), mean(U), length scale, coherence]
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Wind Energy Course, Phuket, 11-15 Sept 2006 7 Wind shear Wind Energy Course, Phuket, 11-15 Sept 2006 8 Aerodynamics
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Wind Energy Course, Phuket, 11-15 Sept 2006 9 Aerodynamic models - types Simple models Blade Element Momentum theory Advanced models Full field Navier-Stokes models Based on airfoil characteristics (lift and drag) Based on geometry Wind Energy Course, Phuket, 11-15 Sept 2006 10 Lift and drag
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11 Blade Element Momentum theory Wind Energy Course, Phuket, 11-15 Sept 2006 12 Numerical aerodynamics: Computational
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This note was uploaded on 11/13/2011 for the course AEE 495 taught by Professor O.uzol during the Spring '11 term at Middle East Technical University.

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Design_of_wind_turbines - Module 1.3 Design of wind...

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