EFFECT OF STATIONARY VANES ON WIND SPEED DISTRIBUTION IN A DRAG-TYPE MULTI-BLADE VERTICAL-AXIS WIND TURBINE

抄録

The drag-type multi-blade vertical-axis wind turbine has high start-up torque and self-starts easily, but in many cases its efficiency is lower than that of a lift-type wind turbine. To increase the turbine output, we installed stationary vanes around the rotating blades. In this paper, we report the results of an experiment conducted at a wind tunnel facility to clarify the wind speed distribution from the stationary vanes to the rotating blades, which is necessary for estimating the wind turbine output from the lift-to-drag coefficient of the rotating blades.