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The performance of different vertical axis wind turbines with J-shaped blades

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dc.contributor.author RABEI, Ivan
dc.date.accessioned 2020-06-11T08:46:04Z
dc.date.available 2020-06-11T08:46:04Z
dc.date.issued 2020
dc.identifier.citation RABEI, Ivan. The performance of different vertical axis wind turbines with J-shaped blades. In: Journal of Engineering Science. 2020, Vol. 27(2), pp. 24-36. ISSN 2587-3474. eISSN 2587-3482. en_US
dc.identifier.issn 2587-3474
dc.identifier.issn 2587-3482
dc.identifier.uri https://doi.org/10.5281/zenodo.3784283
dc.identifier.uri http://repository.utm.md/handle/5014/8879
dc.description.abstract This study is focused on the aerodynamic optimization of Vertical Axis Wind Turbines' blades. A special feature was investigated – the opening at the blade’s trailing edge (opened blades). The blades having this element are known as J-shaped blades. The analysis was done experimentally by testing eleven small scale turbines which were organized into four sets. The performance was compared within each set which contained both full and open bladed turbines. Two airfoil types were examined: symmetrical NACA 0018 and asymmetrical FX 63-137, and two types of blades: straight and helical. The compared turbines had the same key parameters and were subjected to the same external conditions. The tendencies clearly favored the J-shaped turbines for all cases. Besides superior productivity, the open bladed turbines started generating power from lower wind speeds. The positive effects of the openings were not the same for all examined cases and were influenced by the airfoil type, blade shape, openings orientation and wind speed. en_US
dc.description.abstract Acest studiu se referă la optimizarea aerodinamică a palelor pentru turbinele eoliene cu ax vertical. În particular a fost cercetat efectul deschiderii de la bordul de fugă a palelor asupra performanţei turbinei. Palele prevăzute cu acest element sunt cunoscute drept pale deschise sau pale de tip-J. Studiul a fost efectuat în mod experimental prin testarea a unsprezece turbine eoliene de scară mică organizate în patru seturi. Performanţa a fost comparată între rotoarele fiecărui set format din versiuni cu pale deschise și pale pline. Au fost examinate două tipuri de profile aerodinamice: profilul simetric NACA 0018 și profilul asimetric FX 63-137, precum și două tipuri de pale: drepte și elicoidale. Turbinele comparate au fost supuse acelorași condiţii externe și au fost caracterizate de aceiași parametri constructivi. Tendinţele au favorizat în mod evident turbinele cu pale de tip-J. În afară de productivitatea superioară, turbinele cu pale deschise au început generarea de energie de la viteze mai mici ale vântului. Efectele pozitive ale deschiderii nu au fost aceleași pentru toate cazurile analizate fiind influenţate de tipul profilului aerodinamic, forma palelor, orientarea deschiderii și viteza vântului. ro
dc.language.iso en en_US
dc.publisher Tehnica UTM en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject blades of wind turbins en_US
dc.subject helical blades en_US
dc.subject J-shape blades en_US
dc.subject straight blades en_US
dc.subject vertical axis wind turbines en_US
dc.subject wind turbines en_US
dc.subject pale de tip-J en_US
dc.subject pale deschise en_US
dc.subject pale drepte en_US
dc.subject pale elicoidale en_US
dc.subject turbine eoliene cu ax vertical en_US
dc.subject pale ale turbinei eoliene en_US
dc.title The performance of different vertical axis wind turbines with J-shaped blades en_US
dc.type Article en_US


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