風向および変形モードが圧電円筒シェル型発電旗の発電特性に与える影響について

抄録

In the authors’ previous report, a new piezoelectric cylindrical shell wind power generation flag had been proposed as a flexible and durable power generation structure that utilizes vortex excitation vibrations. Preliminary experiments showed that it was expected to generate more than 10 times more power than the conventional planar-shaped wind power generation flag. In the present flag, the cylindrical Bluff Body, which excites vortices, also plays the role of a vibrating structure. When actually generating power outdoors as a wind micro power generation device, it is not always the case that the wind is blowing from a certain direction. When considering the horizontal component of the wind, it is necessary to have a power generation device that can obtain a constant power generation efficiency for any direction of the wind, 360 degrees around the vertical axis. Since the piezoelectric cylindrical shell wind turbine flag is an axisymmetric structure with respect to the vertical axis, it can generate electricity from any direction in the horizontal plane, as long as the bending vibration of the cylinder can be excited. In this study, the effect of wind direction change on the power generation characteristics of the piezoelectric cylindrical shell wind turbine flag was investigated experimentally.