Numerical Analysis of Design Parameters With Strong Influence on the Aerodynamic Efficiency of a Small-Scale Self-Pitch VAWT
Paper i proceeding, 2015

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.

Författare

Carlos Xisto

Chalmers, Tillämpad mekanik, Strömningslära

José Páscoa

Universidade da Beira Interior

Michele Trancossi

Di.S.M.I. UNIMORE RE

Proceedings - ASME 2015 International Mechanical Engineering Congress and Exposition, IMECE 2015, Houston, United States, 13-19 November 2015

Vol. 1 V001T01A003-

Styrkeområden

Energi

Ämneskategorier

Strömningsmekanik och akustik

DOI

10.1115/IMECE2015-51581

ISBN

978-0-7918-5734-2