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THE PERFORMANCE OF DIFFERENT VERTICAL AXIS WIND TURBINES WITH J-SHAPED BLADES

Authors: Rabei, Ivan;

THE PERFORMANCE OF DIFFERENT VERTICAL AXIS WIND TURBINES WITH J-SHAPED BLADES

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.

This study is focused on the aerodynamic optimization of Vertical Axis Wind Turbines#39; blades. A special feature was investigated ndash; the opening at the bladersquo;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

Country
Moldova (Republic of)
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Keywords

pale deschise, straight blades, helical blades, j-shape, vertical axis wind turbine, QA75.5-76.95, Engineering (General). Civil engineering (General), blade opening, creșterea eficienţei, Electronic computers. Computer science, pale elicoidale, pale drepte, pale de tip-J, turbină eoliana cu ax vertical, TA1-2040, J-shape, efficiency improvement

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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