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Wind Tunnel Test of the Variable-Pitch Vertical Axis Wind Turbine

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One of the widely known forms of Vertical-Axis wind turbine (VAWT) is the Darrieus rotor with the straight blades (H-type Darrieus). Vertical-axis wind turbines (VAWT) do not suffer from frequent wind direction changes, but the use of H-type Darrieus wind turbines is virtually prohibited by their inherent inability to self-start. For this reason, we designed a vertical-axis wind turbine with the variable-pitch angle mechanism, which consists of straight blades and Four-bar linkage. This video is wind tunnel test of the Variable-Pitch Vertical Axis Wind Turbine. The angle of attack for the airfoil is better able to maintain the optimum angle by the variable-pitch angle mechanism, and improvement of the performance of VAWT is to be expected.

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