Experimental Research on Darrieus type H Wind Turbines with Semi-open Blades

In this paper the authors present a new Darrieus straight-blade (type H) turbine model with NACA 0010 profile, semi-open - to simulate a hybrid model Darrieus with Savonius. The advantages of this model are: it starts to operate more easily at lower wind speeds and performs better compared to the closed blade model. The paper analyses the geometrical parameters and optimal TSR. The semi-open blades wind turbine starts to rotate from a wind velocity of 1.3 m/s, the closed one from 1.8 m/s. Optimal TSR was 1.23 for the first and 1.08 for the second. Regarding the power coefficients, the maximal values were 0.33 for closed blades model and 0.31 for semi-open blades model.