期刊
ALEXANDRIA ENGINEERING JOURNAL
卷 61, 期 12, 页码 12301-12310出版社
ELSEVIER
DOI: 10.1016/j.aej.2022.05.049
关键词
Airfoil; Lift coefficient; Drag coefficient; Lift-to-drag ratio; Drag bucket; Small wind turbine; Low Reynolds number; Wind energy
资金
- Kwame Nkrumah University of Science and Technology (KNUST)
- Norwegian University of Life Sciences (NMBU) through the Energy and Petroleum (EnPe) Project of the Norwegian Agency for Development Cooperation (Norad)
This study tested the aerodynamic performance characteristics of three new EYO-Series airfoils at low Reynolds numbers. The results showed improvements in aerodynamic performance with increasing Reynolds numbers for all three airfoils. EYO9-8 had the highest stall angle at different Reynolds numbers, and all three airfoils exhibited good drag performance.
In this study, the aerodynamic performance characteristics of three new EYO-Series low Reynolds number (Re) airfoils were tested at Re = 100,000 to 500,000, which are typical range of Re numbers encountered by airfoils of small wind turbine blades. The results generally demonstrated aerodynamic performance improvements of all three airfoils with increase in Re. EYO7-8 recorded the highest lift-to-drag ratio of 170 at Re = 500,000. EYO9-8 had the highest stall angle of 15 degrees at all tested Re except at Re = 200,000. EYO9-8 again had gradual stall performances at all Re. All three airfoils also had good drag bucket performances where initial increases in lift were accompanied by either constant or reducing drag. The findings from this study showed that there are no significant variations in the lift performance for Re >= 300,000. The low variation in lift performance for the EYO-Series airfoils is desirable for the design of small wind turbine blades for low Re applications. (C) 2022 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University
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