縦渦によって駆動する円柱翼風車の動力安定性および過渡的応答に及ぼす風車形状の影響

抄録

When a propeller is replaced by a circular cylinder and a ring-shaped flat plate is installed in its wake coaxially to the rotation shaft, a longitudinal vortex forms the intersection area. It generates lift force on the cylinder blade and drives it to rotate as a wind turbine. In this study, the influence of the shape factor on the transient response of the rotation recovery from sudden change of the rotation speed is experimentally examined. The rise time that is defined by the time from the cessation of force to keep a certain rotation speed to the achievement of the steady-state is measured. The rise time of the circular cylinder wind turbine is shorter than the vertical axis traditional wind turbine. The rise time for the transition from a lower rotation to a higher steady rotation is faster compared with the response of the opposite conditions, that is, from a higher to the lower steady rotation.