SMART wind turbine rotor. Data analysis and conclusions

This report documents the data post-processing and analysis performed to date on the field test data. Results include the control capability of the trailing edge flaps, the combined structural and aerodynamic damping observed through application of step actuation with ensemble averaging, direct observation of time delays associated with aerodynamic response, and techniques for characterizing an operating turbine with active rotor control.

[1]  J. Gordon Leishman,et al.  Challenges in modelling the unsteady aerodynamics of wind turbines , 2002 .

[2]  Mac Gaunaa,et al.  Load reduction using pressure difference on airfoil for control of trailing edge flaps , 2009 .

[3]  J. Gordon Leishman,et al.  VALIDATION OF A FREE-VORTEX WAKE MODEL FOR WIND TURBINES IN YAWED FLOW , 2006 .

[4]  Chengjian He.  Development and application of a generalized dynamic wake theory for lifting rotors , 1989 .

[5]  Scott Schreck,et al.  Boundary Layer State and Flow Field Structure Underlying Rotational Augmentation of Blade Aerodynamic Response , 2003 .

[6]  Mac Gaunaa,et al.  Wind tunnel test on wind turbine airfoil with adaptive trailing edge geometry , 2007 .

[7]  R. Stephenson.  A and V , 1962, The British journal of ophthalmology.

[8]  Leslie Greengard,et al.  A fast algorithm for particle simulations , 1987 .

[9]  J. Sørensen,et al.  Wind turbine wake aerodynamics , 2003 .

[10]  Sridhar Kota,et al.  The Impact of Active Aerodynamic Load Control on Fatigue and Energy Capture at Low Wind Speed Sites. , 2009 .

[11]  Mac Gaunaa,et al.  Unsteady 2D potential-flow forces on a thin variable geometry airfoil undergoing arbitrary motion , 2006 .

[12]  J. Gordon Leishman,et al.  Challenges in Modeling the Unsteady Aerodynamics of Wind Turbines , 2002 .

[13]  Christian Bak,et al.  Implementing a Dynamic Stall Model for Airfoils with Deformable Trailing Edges , 2008 .

[14]  C. P. van Dam,et al.  Design-oriented high-lift methodology for general aviation and civil transport aircraft , 2001 .

[15]  J. Gordon Leishman,et al.  COMPARISON OF MOMENTUM AND VORTEX METHODS FOR THE AERODYNAMIC ANALYSIS OF WIND TURBINES , 2005 .

[16]  Vasilis Riziotis,et al.  Non-linear aerodyanmics and fatigue loading on wind turbines operating at extreme sites , 1997 .

[17]  David G. Wilson,et al.  Combined Individual Pitch Control and Active Aerodynamic Load Controller Investigation for the 5MW UPWIND Turbine. , 2009 .

[18]  Christian Bak,et al.  Potential load reduction using airfoils with variable trailing edge geometry , 2005 .

[19]  Christian Bak,et al.  Load Reduction Potential Using Airfoils with Variable Trailing Edge Geometry , 2005 .

[20]  George A. Lesieutre,et al.  Miniature trailing-edge effectors for rotorcraft performance enhancement , 2007 .

[21]  G.A.M. van Kuik,et al.  Review of state of the art in smart rotor control research for wind turbines , 2010 .

[22]  Dale E. Berg,et al.  System ID Modern Control Algorithms for Active Aerodynamic Load Control and Impact on Gearbox Loading , 2010 .

[23]  Sridhar Kota,et al.  Active Aerodynamic Blade Load Control Impacts on Utility-Scale Wind Turbines. , 2009 .

[24]  Samuel D. Stearns,et al.  Digital Signal Processing with Examples in MATLAB , 1996 .

[25]  J. Leishman,et al.  Performance Predictions Of NREL Phase VI Combined Experiment Rotor Using A Free-Vortex Wake Model , 2006 .

[26]  Matthew A. Lackner,et al.  A comparison of smart rotor control approaches using trailing edge flaps and individual pitch control , 2009 .

[27]  David G. Wilson,et al.  ACTIVE AERODYNAMIC BLADE CONTROL DESIGN FOR LOAD REDUCTION ON LARGE WIND TURBINES , 2009 .

[28]  Jens Nørkær Sørensen,et al.  The Science of Making Torque from Wind , 2007 .

[29]  Niels Kjølstad Poulsen,et al.  Full‐scale test of trailing edge flaps on a Vestas V27 wind turbine: active load reduction and system identification , 2014 .

[30]  Niels Troldborg,et al.  Computational Study of the Risø-B1-18 Airfoil with a Hinged Flap Providing Variable Trailing Edge Geometry , 2005 .

[31]  Curran Crawford,et al.  Comparison of Potential Flow Wake Models for Horizontal-Axis Wind Turbine Rotors , 2010 .

[32]  M. Joglekar,et al.  An Actuator-Disc Analysis of Helicopter Wake Geometry and the Corresponding Blade Response , 1970 .

[33]  Farzad Naeim.  Dynamics of Structures, Theory and Applications in Earthquake Engineering, 2nd Edition , 2001 .

[34]  Niels Kjølstad Poulsen,et al.  Results from the first full scale wind turbine equipped with trailing edge flaps , 2010 .

[35]  Peter S. Bernard,et al.  Vortex filament simulation of the turbulent coflowing jet , 2009 .

[36]  Herbert J. Sutherland,et al.  STATISTICAL ANALYSIS OF INFLOW AND STRUCTURAL RESPONSE DATA FROM THE LIST PROGRAM , 2003 .

[37]  W. Marsden.  I and J , 2012 .

[38]  Gijs van Kuik,et al.  Closed-Loop Control Wind Tunnel Tests on an Adaptive Wind Turbine Blade for Load Reduction , 2008 .

[39]  David A. Peters,et al.  Theoretical prediction of dynamic inflow derivatives , 1980 .

[40]  Mac Gaunaa,et al.  Load alleviation on wind turbine blades using variable airfoil geometry , 2006 .

[41]  Gerard van Bussel,et al.  Estimating the Unsteady Angle of Attack from Blade Pressure Measurements on the NREL Phase VI Rotor in Yaw using a Free-Wake Vortex Model , 2006 .

[42]  Sandia Report,et al.  SMART Wind Turbine Rotor: Design and Field Test , 2014 .

[43]  J. Gordon Leishman,et al.  Free-Vortex Filament Methods for the Analysis of Helicopter Rotor Wakes , 2002 .

[44]  Michel Verhaegen,et al.  On the proof of concept of a ‘Smart’ wind turbine rotor blade for load alleviation , 2008 .

[45]  David G. Wilson,et al.  Active Aerodynamic Blade Distributed Flap Control Design Procedure for Load Reduction on the UpWind 5MW Wind Turbine , 2010 .

[46]  Patrick Moriarty,et al.  AeroDyn Theory Manual , 2005 .

[47]  Lakshmi N. Sankar,et al.  Computational Study of Horizontal Axis Wind Turbines , 1999 .

[48]  H. Snel.  SURVEY OF INDUCTION DYNAMICS MODELLING WITHIN BEM-LIKE CODES: Dynamic inflow and yawed flow modelling revisited , 2001 .

[49]  David A. Peters,et al.  Finite-State Induced-Flow Model for Rotors in Hover and Forward Flight , 1989 .