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International Journal of Energy and Environmental Engineering

Erschienen in:

02.08.2021 | Original Research

Study on the effects of winglets: wind turbine blades having circular arc blade section profile

verfasst von: Nafiz Ahmed Khan, M.Sc., Dr. Md Quamrul Islam, PhD

Erschienen in: International Journal of Energy and Environmental Engineering | Ausgabe 4/2021

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Abstract

Performance enhancement of horizontal axis wind turbine with circular arc blade section has been investigated both experimentally and computationally using upstream and downstream winglet configurations. A computational study is performed for a three-blade rotor of 0.5-m-diameter in ANSYS Fluent to identify the optimum values for cant angle and twist angle. Findings from the numerical analysis are then utilized as inputs for the experimental study. The height of the winglet is selected as 6% of the rotor radius while cant angle and twist angle are 55° and 0°, respectively. Power and thrust coefficient are measured for both the upstream and downstream winglet orientations at different pitch angles (\(\varphi\)) and tip speed ratios (λ). Results show that upstream winglet provides 9.79% extra power in comparison with reference model at design tip speed ratio (TSR = 5) and zero pitch angle. Improved performance is obtained with downstream winglet achieving almost 15% additional power. Conversely, for all the pitch angles, power decreases as λ^0.1 beyond the design tip speed.

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Titel: Study on the effects of winglets: wind turbine blades having circular arc blade section profile
verfasst von: Nafiz Ahmed Khan, M.Sc.
Dr. Md Quamrul Islam, PhD
Publikationsdatum: 02.08.2021
Verlag: Springer Berlin Heidelberg
Erschienen in: International Journal of Energy and Environmental Engineering / Ausgabe 4/2021
Print ISSN: 2008-9163
Elektronische ISSN: 2251-6832
DOI: https://doi.org/10.1007/s40095-021-00414-z

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