Title: Speed deficit determination in the wake of a Darrieus-Troposkein turbine

Authors: Jorge Lassig; Carlos Labriola

Addresses: Department of Mechanical Engineering, University National of Comahue, Neuquén, Rio Negro, Argentina ' Department of Mechanical Engineering, University National of Comahue, Neuquén, Rio Negro, Argentina

Abstract: A series of tests on small Darrieus-Troposkein Turbines (DTT) were performed with a wind tunnel, to determine the speed deficit and turbulence intensity that adds to the wake. These tests were made in order to provide information on the interaction that could result on an array of this type of wind turbines, laid on the rooftop of a building. The tested turbines had a diameter of 0.85 m and a height of 1.30 m. It had two blades of symmetrical cross section NACA 0024, with a solidity of 0.44 and tested with a Specific Speed (TRS) of 2.5. The decrease of the rotor speed was 10% with a wind speed from 9 to 13 m/s. The turbulence intensity added by the turbine in the wake, measured at a distance of one diameter was 0.27, and 0.17 measured at two diameters.

Keywords: Darrieus; wake; speed deficit; turbulence intensity; urban wind.

DOI: 10.1504/IJAD.2022.129992

International Journal of Aerodynamics, 2022 Vol.7 No.3, pp.208 - 223

Accepted: 03 Feb 2022
Published online: 04 Apr 2023 *

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