Open AccessA stochastic model for the simulation of wind turbine blades in static stall
Author(s) -
Bertagnolio Franck,
Rasmussen Flemming,
Sørensen Niels N.,
Johansen Jeppe,
Madsen Helge Aa.
Publication year - 2010
Publication title -
wind energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.743
H-Index - 92
eISSN - 1099-1824
pISSN - 1095-4244
DOI - 10.1002/we.342
Subject(s) - stall (fluid mechanics) , airfoil , aerodynamics , aeroelasticity , pitching moment , turbine , engineering , computer science , mechanics , structural engineering , aerospace engineering , physics , angle of attack
The aim of this work is to improve aeroelastic simulation codes by accounting for the unsteady aerodynamic forces that a blade experiences in static stall. A model based on a spectral representation of the aerodynamic lift force is defined. The drag and pitching moment are derived using a conditional simulation technique for stochastic processes. The input data for the model can be collected either from measurements or from numerical results from a Computational Fluid Dynamics code for airfoil sections at constant angles of attack. An analysis of such data is provided, which helps to determine the characteristics of stall. The model is applied to wind turbine rotor cases, including the stand still condition, and results are compared to experimental data. Copyright © 2009 John Wiley & Sons, Ltd.