論文
実験及び数値計算に基づくヘリカルタービンの性能評価及び理論モデルの提案
2019 年 47 巻 6 号 p. 342-353
詳細
2019 年 47 巻 6 号 p. 342-353
A helical wind turbine has been analyzed experimentally and numerically and a novel design protocol has been proposed by means of blade element and momentum theory. The subject of the present analysis is to discuss the effect of low tip speed ratio and high one, respectively. In the low tip speed ratio, the turbine is driven by the torque generated from the flow turning radially after colliding with the runner. On the other hand, in the high tip speed ratio, the turbine is operated by the torque generated from the flow passing through axially the turbine. The present helical turbine has a maximum power coefficient as 40%, which is larger than that of conventional multi-blade wind turbine and is competitive with Darrieus wind turbine. Also, the turbine has a maximum torque coefficient of 48%, which is slightly lower than that of Savonius wind turbine.
