A Study of the Performance of a Wind-Lens Turbine in Steady Wind with Velocity Disturbance

Abstract

A wind-lens turbine has been developed as a high performance HAWT. To investigate the effect of turbulence intensity on the wind turbine, the paper shows the power and torque coefficient in the steady wind of mean velocity 7 m/s with turbulent intensity 2.4% and 4.3%. The turbines are made based on the two blade types - NACA 63xxx and MEL002. As the results, the power coefficient of the wind-lens turbine is more than 1.8 times as larger as one of the rotor only wind turbine. In particular, the MEL type wind-lens turbine has flat distribution of power coefficient in the wide range of tip speed ratio from 2.5 to 4.0 than NACA’s one. The characteristic shows as a high-performance wind turbine.