Experimental study: Evaluation of the a Vane-Type Vortex Generator in Vertical Axis Wind Turbine Under Different Pitch Angles

Today, wind energy has become one of the largest sources of energy in the world. This has led researchers to optimize this energy. The wind turbine is the largest converter of wind energy. One of the optimization methods in lift based wind turbines is to control the flow on the blade’s airfoil section. One of the ways is to install vortex generators to stall delay. In this study, a Vane_type vortex generator is installed on low-pressure side of a lift-based vertical axis wind turbine blade and is evaluated at two different pitch angles and various wind speeds. In this case, two pitch angles of ۰ and ۸.۵ degrees are investigated at a wind speed range from ۳.۲ m/s to ۵.۴ m/s. The results exhibit that not only installing a vortex generator on the low pressure side of a wind turbine airfoil increases the power production,but also increasing pitch angle of vertical blades up to ۸.۵ degrees increases the power production significantly. As far as the results of the turbine with a vortex generator on the high-pressure side of the airfoil, the wind turbine blade with a pitch angle of ۸.۵ degrees had more power and torque than the case without a vortex generator and a pitch angle of ۰ degrees.

کلیدواژه ها:

Vortex generator ، wind turbine ، flow control ، airfoil