Large wind turbine edge instability field validation
Dillon M. Volk, Bjarne Skovmose Kallesøe, Scott J. Johnson, Georg Raimund Pirrung, Riccardo Riva, Félix Barnaud
Abstract
Abstract Wind turbines can exhibit flutter-like edgewise instabilities past a critical rotor speed. These edgewise instabilities are dominated by an edge-torsion coupling due to flapwise blade deflection. This paper experimentally validates the predicted stability limit of a 7 MW machine. State of the art simulation software is used to compare against recorded test data and characterize the observed flutter mechanism. The critical rotor speed at which the edgewise instabilities occur at in field measurements can be predicted by time domain simulations and stability analysis with very good agreement.
Topics & Concepts
FlutterDeflection (physics)Torsion (gastropod)TurbineInstabilityWind powerLeading edgeCritical speedTurbine bladePhysicsStructural engineeringMechanicsRotor (electric)EngineeringAerospace engineeringMechanical engineeringClassical mechanicsAerodynamicsElectrical engineeringMedicineSurgeryWind Energy Research and DevelopmentVibration and Dynamic AnalysisFluid Dynamics and Vibration Analysis