SPECTRAL ANALYSIS OF UNSTEADY FLOW SIMULATION IN A SMALL VAWT

Annie-Claude Bayeul-Laine (1) , Sophie Simonet (1) , Gérard Bois (1)

1 LML - Laboratoire de Mécanique de Lille - FRE 3723

The vertical axis wind turbine studied in this paper combine two rotations: one rotating movement of each blade around its own axis and one rotating movement around turbine's axis. The aim of this paper is to analyse the effect of this two combine movements on fields of pressure and on global forces on each blade with time. Preliminary calculations showed, for some initial blade stagger angles (angle between blade 1 and x axis), that flow is highly unsteady and sometimes hardly periodic. The main goal here is to present spectral analysis of unsteady results like temporal pressure on specific points in the domain and temporal forces on blades and to show the influence of the two combine movements for two different blade stagger angles for elliptic blades.

Mots clés: Numerical simulations; Performance coefficient; Unsteady simulation; VAWT; Vertical axis; Wind energy; Pitch controlled blades

Domaines: Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]

Annie-Claude Bayeul-Laine, Sophie Simonet, Gérard Bois. SPECTRAL ANALYSIS OF UNSTEADY FLOW SIMULATION IN A SMALL VAWT. 14th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC-14, Feb 2012, United States. pp.9. ⟨hal-00783558⟩