Unsteady Surface Pressures and Airload of a Pitching Airfoil

This paper presents unsteady surface pressure variations of a symmetrical NACA0012 section commonly used on Vertical-axis wind turbine blades. The section was tested at a Reynolds number of 90,000, mean incidence angles of 15 and -15, and a reduced frequency of 0.20. The experimental results show th...

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Bibliographic Details
Published in:Energy procedia 2013, Vol.34, p.407-416
Main Authors: Worasinchai, Supakit, Ingram, Grant, Dominy, Robert
Format: Article
Language:English
Subjects:
Airfoil
Dynamic performance characteristics
Low Reynolds number
Vortex formation
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Summary:This paper presents unsteady surface pressure variations of a symmetrical NACA0012 section commonly used on Vertical-axis wind turbine blades. The section was tested at a Reynolds number of 90,000, mean incidence angles of 15 and -15, and a reduced frequency of 0.20. The experimental results show that the airfoil motion had significant effects on surface pressure distribution over the airfoil, leading to a formation and shedding of an energetic leading edge vortex which strongly affects the overall airload over the incidence range.
ISSN:1876-6102
1876-6102
DOI:10.1016/j.egypro.2013.06.769