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European Online Journal of Natural and Social Sciences: Proceedings

Empirical Study of Combined Airfoil of Wind Turbine for Using In Small Turbines

Milad Babadi Soultanzadeh, Babak Mehmandoost Esfahani, Davood Toghraee Semiromi

Abstract


In this study a wind tunnel experimental test was conducted on a new hybrid airfoil to obtain its performance specifications for the reason of taking advantage of such a hybrid in the structure of turbines that operate at low Reynolds numbers (i.e. small turbines work with low-speed wind). The hybrid airfoil for the current study was made of the two conventional airfoils used in the NACA 63-XXX and Wortmann FX wind turbines. Aerodynamic loads were measured by an aerodynamic balance device and the pressure distribution on the hybrid airfoil under investigation has been calculated by a pressure gauge installed on the device and finally, the obtained results were compared with previous airfoil designs. Due to the high lift coefficient and appropriate lift-to-drag ratio of the hybrid airfoil, the achieved results confirmed the suitability of the airfoil performance characteristics to utilize in the small wind turbines which operate at low Reynolds numbers.


Keywords


Renewable energies, wind energy, horizontal axis wind turbines, airfoil, wind tunnels, experimental aerodynamics

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