Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

Effect of dynamic stall on the aerodynamics of vertical-axis wind turbines

Brown, Richard and Scheurich, Frank (2011) Effect of dynamic stall on the aerodynamics of vertical-axis wind turbines. AIAA Journal, 49 (11). pp. 2511-2521. ISSN 0001-1452

[img] PDF
Brown_RE_Pure_Effect_of_dynamic_stall_on_the_aerodynamics_of_vertical_axis_wid_turbines_Nov_2011.pdf - Draft Version

Download (6MB)

Abstract

Accurate simulations of the aerodynamic performance of vertical-axis wind turbines pose a significant challenge for computational fluid dynamics methods. The aerodynamic interaction between the blades of the rotor and the wake that is produced by the blades requires a high-fidelity representation of the convection of vorticity within the wake. In addition, the cyclic motion of the blades induces large variations in the angle of attack on the blades that can manifest as dynamic stall. The present paper describes the application of a numerical model that is based on the vorticity transport formulation of the Navier–Stokes equations, to the prediction of the aerodynamics of a verticalaxis wind turbine that consists of three curved rotor blades that are twisted helically around the rotational axis of the rotor. The predicted variation of the power coefficient with tip speed ratio compares very favorably with experimental measurements. It is demonstrated that helical blade twist reduces the oscillation of the power coefficient that is an inherent feature of turbines with non-twisted blade configurations.