Journal article
Self-induced vibrations of a DU96-W-180 airfoil in stall : Self-induced vibrations of a DU96-W-180 airfoil in stall
This work presents an analysis of two-dimensional (2D) and three-dimensional (3D) non-moving, prescribed motion and elastically mounted airfoil computational fluid dynamics (CFD) computations. The elastically mounted airfoil computations were performed by means of a 2D structural model with two degrees of freedom.
The computations aimed at investigating the mechanisms of both vortex-induced and stall-induced vibrations related to a wind turbine blade at standstill conditions. In this work, a DU96-W-180 airfoil was used in the angle-of-attack region potentially corresponding to stallinduced vibrations. The analysis showed significant differences between the aerodynamic stability limits predicted by 2D and 3D CFD computations.
A general agreement was reached between the prescribed motion and elastically mounted airfoil computations. 3D computations indicated that vortex-induced vibrations are likely to occur at modern wind turbine blades at standstill. In contrast, the predicted cut-in wind speed necessary for the onset of stall-induced vibrations appeared high enough for such vibrations to be unlikely.
Copyright © 2013 John Wiley & Sons, Ltd.
Language: | English |
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Year: | 2014 |
Pages: | 641-655 |
ISSN: | 10991824 and 10954244 |
Types: | Journal article |
DOI: | 10.1002/we.1596 |
ORCIDs: | Skrzypinski, Witold Robert , Gaunaa, Mac , Sørensen, Niels N. and Zahle, Frederik |
DU96‐W‐180 airfoil stall flutter stall induced standstill vibrations