01/01/2019 Engineering Geology
DOI: 10.18178/ijmerr.8.3.385-392 SemanticScholar ID: 204264916 MAG: 2976515445

CFD Analysis for the Performance of Gurney Flap on Aerofoil and Vertical Axis Turbine

Publication Summary

A numerical study was carried out to investigate the effects of a Gurney flap on the aerodynamics performance of the NACA 0018 aerofoil and an associated three-blades rotor of a H-type Darrieus wind turbine. The flow fields around a single aerofoil and the Vertical Axis Wind Turbine (VAWT) rotor are studied using URANS. The height of Gurney flap ranges from 1% to 5% of the aerofoil chord length. The flow fields around a single aerofoil and the Vertical Axis Wind Turbine (VAWT) rotor are simulated using URANS. The results show that the Gurney flap can increase the lift and lift-to-drag ratio of the aerofoil. As a result, adding a Gurney flap can significantly improve the power coefficient of the VAWT at low tip speed ratio, where it typically gives low power production. The causing mechanism is discussed in detail  —Gurney flap, CFD, wind turbine, aerofoil

CAER Authors

Avatar Image for Eldad Avital

Dr. Eldad Avital

Queen Mary University of London - Reader in Computational (& Experimental) Fluids and Acoustics

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