Effect of blade tip shapes on the performance of a small HAWT: An investigation in a wind tunnel

Aerodynamic performance of a horizontal axis wind turbine blade is affected by its span stacking whether it is two (2D) or three-dimension (3D). The optimization by including swept or/and dihedral at the blade tip tends to enhance its aerodynamic behavior. In order to correctly select the swept angl...

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Bibliographic Details
Published in:Case studies in thermal engineering 2020-06, Vol.19, p.100634, Article 100634
Main Authors: Iswahyudi, Sigit, Sutrisno, Prajitno, Wibowo, Setyawan Bekti
Format: Article
Language:English
Subjects:
Blade tip shape
Roll-up vortex
Small HAWT
Tip loss
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Summary:Aerodynamic performance of a horizontal axis wind turbine blade is affected by its span stacking whether it is two (2D) or three-dimension (3D). The optimization by including swept or/and dihedral at the blade tip tends to enhance its aerodynamic behavior. In order to correctly select the swept angle and anhedral in designing 3D blades, the behavior of the blade geometry variation should be characterized. By using wind tunnel experimentation, modified blades at their tips by swept and anhedral are characterized. Swept tip blade modification only produces weak torque generation while adding anhedral tip blade modification enhances the produced torque significantly.
ISSN:2214-157X
2214-157X
DOI:10.1016/j.csite.2020.100634