To estimate the blade performance of a Darrieus-type cross-flow water turbine, differences between the characteristics of a Darrieus blade which moves along a circular path, and that of the blade at rest in a uniform steady flow are examined quantitatively by use of experimental data for three types of blades with different cambers or chord lengths from each other. It is found that a unique stall character strongly effects the drag force acting on the Durrieus blade. A model of the changing pattern of the drag coefficient by a dynamic stall is proposed from the results of measurement for estimating the blade characteristics. As the result, the blade characteristics and performances of the Darrieus-type runner are predicted well by the use of aerofoil data in a uniform steady flow and taking into account the effect of a circling motion, and the dynamic effect of the unsteady flow around the Darrieus blade.
|ジャーナル||Transactions of the Japan Society of Mechanical Engineers Series B|
|出版ステータス||出版済み - 1991|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering