Abstract
This paper presents a solution for enhancement of aerodynamic efficiency for asymmetric airfoils. In order to increase the lift and reduce the drag forces for a blade segment, a groove was created on its surface. There were carried out experiments consisting in the analysis of two asymmetric airfoil segments of the same type in the wind tunnel. One segment was designed with the groove and the other without it. The optimum location of the groove was determined by means of CFD analysis. Simulation results were compared to test results and the CFD analysis model was validated.
Highlights
Utilization of wind potential at small scale is hampered by reduced efficiency of low-power wind turbines
A wind turbine blade segment was analyzed with asymmetrical aerodynamic profile that was equipped with a groove on the surface
There were carried out experiments consisting of measurement of the lift and drag forces of the blade section in the wind tunnel for different angles of attack
Summary
Utilization of wind potential at small scale is hampered by reduced efficiency of low-power wind turbines. Our team has done some research on increasing the aerodynamic efficiency of blades for low power wind turbines (1-10 kW). A wind turbine blade segment was analyzed with asymmetrical aerodynamic profile that was equipped with a groove on the surface.
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