Geometrical parameters influencing the aerodynamic efficiency of a small-scale self-pitch high solidity VAWT

XISTO, Carlos M, PASCOA, Jose C and TRANCOSSI, Michele (2016). Geometrical parameters influencing the aerodynamic efficiency of a small-scale self-pitch high solidity VAWT. ASME Journal of Solar Energy Engineering, 138 (3), 031006.

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Link to published version:: 10.1115/1.4032794

Abstract

In the paper, four key design parameters with a strong influence on the performance of a small-scale high solidity variable pitch VAWT (Vertical Axis Wind Turbine), operating at low tip-speed-ratio (TSR) are addressed. To this aim a numerical approach, based on a finite-volume discretization of two-dimensional Unsteady RANS equations on a multiple sliding mesh, is proposed and validated against experimental data. The self-pitch VAWT design is based on a straight blade Darrieus wind turbine with blades that are allowed to pitch around a feathering axis, which is also parallel to the axis of rotation. The pitch angle amplitude and periodic variation are dynamically controlled by a four-bar-linkage system. We only consider the efficiency at low and intermediate TSR, therefore the pitch amplitude is chosen to be a sinusoidal function with a considerable amplitude. The results of this parametric analysis will contribute to define the guidelines for building a full size prototype of a small scale turbine of increased efficiency.

Item Type: Article
Identification Number: 10.1115/1.4032794
Related URLs:
Depositing User: Michele Trancossi
Date Deposited: 04 Mar 2016 14:16
Last Modified: 07 Dec 2016 19:02
URI: http://shura.shu.ac.uk/id/eprint/11662

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