Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 29, 2018 - November 30, 2018
When the upstream cylinder with the rotating shaft moves parallel along the ring-shaped flat plate placed the downstream side, the steady lift force acts on the cylinder as the driving force of the wind turbine by the longitudinal vortex statically generated behind the cylinder. In this study, we examined that the occurrence of the time change of torque in the new wind turbine driven by longitudinal vortex predicted by numerical analysis. Furthermore, the relation between the operating condition of the wind turbine and its vibration was experimentally clarified.
In this study, we found that the torque fluctuation becomes very large at the tip speed ratio λ = 0.1. Since torque fluctuation reduces power efficiency, it was found that it is necessary to avoid this tip speed ratio in actual operation.
