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The Impact of The Sinusoidal Pitch Angle on The Vertical Axis Wind Turbine Type-Darrieus

Nowadays, wind power has become a promising source to generate electricity because wind power is clean and efficient. In this paper we aim to study the impact of the sinusoidal pitch angle on the performance of the Darrieus vertical axis wind turbines, by using numerical simulation. The software “ANSYS Fluent” has been used to calculate the power coefficient and to analyze the behaviors of velocity and pressure field, the results show that the pitch angle has a significant effect on the performance of the turbine and the power coefficient increases compared with the turbine with zero pitch angle, the power coefficient peak is 0.26 for the new design with sinusoidal pitch angle, and 0.14 for the conventional design with zero pitch angle, at the same value of TSR. However the velocity and pressure around the blades for the sinusoidal pitch angle are higher than the zero pitch angle.