Wind energy proceedings of the Euromech Colloquium ; with 14 tables

This book comprises reports on basic research, as well as research related to the practical exploitation and application of wind energy. "Wind Energy" comprehensively describes the atmospheric turbulent wind condition on different time scales, and the interaction of wind turbines with both wind and water flows, which are significant factors to consider for the design, operation and maintenance of wind turbines in offshore conditions. Topics of particular interest include: * wind climate & wind field * gusts, extreme events & turbulence * rotor aerodynamics & wake effects * power production & fluctuations * sea states & wave loads * materials (composites, steel, concrete) & fatigue * structural health monitoring Front Matter....Pages I-XXXI Offshore Wind Power Meteorology....Pages 1-6 Wave Loads on Wind-Power Plants in Deep and Shallow Water....Pages 7-13 Time Domain Comparison of Simulated and Measured Wind Turbine Loads Using Constrained Wind Fields....Pages 15-20 Mean Wind and Turbulence in the Atmospheric Boundary Layer Above the Surface Layer....Pages 21-25 Wind Speed Profiles above the North Sea....Pages 27-31 Fundamental Aspects of Fluid Flow over Complex Terrain for Wind Energy Applications....Pages 33-38 Models for Computer Simulation of Wind Flow over Sparsely Forested Regions....Pages 39-42 Power Performance via Nacelle Anemometry on Complex Terrain....Pages 43-47 Pollutant Dispersion in Flow Around Bluff-Bodies Arrangement....Pages 49-53 On the Atmospheric Flow Modelling over Complex Relief....Pages 55-59 Comparison of Logarithmic Wind Profiles and Power Law Wind Profiles and their Applicability for Offshore Wind Profiles....Pages 61-64 Turbulence Modelling and Numerical Flow Simulation of Turbulent Flows....Pages 65-71 Gusts in Intermittent Wind Turbulence and the Dynamics of their Recurrent Times....Pages 73-79 Report on the Research Project OWID – Offshore Wind Design Parameter....Pages 81-85 Simulation of Turbulence, Gusts and Wakes for Load Calculations....Pages 87-92 Short Time Prediction of Wind Speeds from Local Measurements....Pages 93-98 Wind Extremes and Scales: Multifractal Insights and Empirical Evidence....Pages 99-104 Boundary-Layer Influence on Extreme Events in Stratified Flows over Orography....Pages 105-109 The Statistical Distribution of Turbulence Driven Velocity Extremes in the Atmospheric Boundary Layer – Cartwright/Longuest-Higgins Revised....Pages 111-114 Superposition Model for Atmospheric Turbulence....Pages 115-118 Extreme Events Under Low-Frequency Wind Speed Variability and Wind Energy Generation....Pages 119-122 Stochastic Small-Scale Modelling of Turbulent Wind Time Series....Pages 123-127 Quantitative Estimation of Drift and Diffusion Functions from Time Series Data....Pages 129-133 Scaling Turbulent Atmospheric Stratification: A Turbulence/Wave Wind Model....Pages 135-138 Wind Farm Power Fluctuations....Pages 139-145 Network Perspective of Wind-Power Production....Pages 147-152 Phenomenological Response Theory to Predict Power Output....Pages 153-158 Turbulence Correction for Power Curves....Pages 159-162 Online Modeling of Wind Farm Power for Performance Surveillance and Optimization....Pages 163-166 Uncertainty of Wind Energy Estimation....Pages 167-171 Characterisation of the Power Curve for Wind Turbines by Stochastic Modelling....Pages 173-177 Handling Systems Driven by Different Noise Sources: Implications for Power Curve Estimations....Pages 179-182 Experimental Researches of Characteristics of Windrotor Models with Vertical Axis of Rotation....Pages 183-186 Methodical Failure Detection in Grid Connected Wind Parks....Pages 187-190 Modelling of the Transition Locations on a 30% thick Airfoil with Surface Roughness....Pages 191-197 Helicopter Aerodynamics with Emphasis Placed on Dynamic Stall....Pages 199-204 Determination of Angle of Attack (AOA) for Rotating Blades....Pages 205-209 Unsteady Characteristics of Flow Around an Airfoil at High Angles of Attack and Low Reynolds Numbers....Pages 211-214 Aerodynamic Multi-Criteria Shape Optimization of VAWT Blade Profile by Viscous Approach....Pages 215-219 Rotation and Turbulence Effects on a HAWT Blade Airfoil Aerodynamics....Pages 221-226 3D Numerical Simulation and Evaluation of the Air Flow Through Wind Turbine Rotors with Focus on the Hub Area....Pages 227-230 Performance of the Risø-B1 Airfoil Family for Wind Turbines....Pages 231-234 Aerodynamic Behaviour of a New Type of Slow-Running VAWT....Pages 235-240 Numerical Simulation of Dynamic Stall using Spectral/hp Method....Pages 241-244 Modeling of the Far Wake behind a Wind Turbine....Pages 245-248 Stability of the Tip Vortices in the Far Wake behind a Wind Turbine....Pages 249-252 Modelling Turbulence Intensities Inside Wind Farms....Pages 253-257 Numerical Computations of Wind Turbine Wakes....Pages 259-263 Modelling Wind Turbine Wakes with a Porosity Concept....Pages 265-269 Prediction of Wind Turbine Noise Generation and Propagation based on an Acoustic Analogy....Pages 271-274 Comparing WAsP and Fluent for Highly Complex Terrain Wind Prediction....Pages 275-279 Fatigue Assessment of Truss Joints Based on Local Approaches....Pages 281-286 Advances in Offshore Wind Technology....Pages 287-292 Benefits of Fatigue Assessment with Local Concepts....Pages 293-296 Extension of Life Time of Welded Fatigue Loaded Structures....Pages 297-300 Damage Detection on Structures of Offshore Wind Turbines using Multiparameter Eigenvalues....Pages 301-304 Influence of the Type and Size of Wind Turbines on Anti-Icing Thermal Power Requirements for Blades....Pages 305-308 High-cycle Fatigue of “Ultra-High Performance Concrete” and “Grouted Joints” for Offshore Wind Energy Turbines....Pages 309-312 A Modular Concept for Integrated Modeling of Offshore WEC Applied to Wave-Structure Coupling....Pages 313-317 Solutions of Details Regarding Fatigue and the Use of High-Strength Steels for Towers of Offshore Wind Energy Converters....Pages 319-324 On the Influence of Low-Level Jets on Energy Production and Loading of Wind Turbines....Pages 325-328 Reliability of Wind Turbines....Pages 329-332 This Book Is Comprised Of The Proceedings Of The Euromech Colloquium 464b Wind Energy. It Comprises Reports On Basic Research, As Well As Research Related To The Practical Exploitation And Application Of Wind Energy. The Book Describes The Atmospheric Turbulent Wind Condition On Different Time Scales, And The Interaction Of Wind Turbines With Both Wind And Water Flows. These Influence The Design, Operation And Maintenance Of Offshore Wind Turbines.