TY - JOUR
T1 - Experimental Considerations in an Approximate Method for Estimating the Blade Performance of Darrieus-Type Cross-Flow Water Turbines
AU - Takamatsu, Yasuo
AU - Furukawa, Akinori
AU - Takenouchi, Kazuki
AU - Ōkuma, Kusuo
PY - 1991
Y1 - 1991
N2 - 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.
AB - 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.
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U2 - 10.1299/kikaib.57.3110
DO - 10.1299/kikaib.57.3110
M3 - Article
AN - SCOPUS:0026226007
SN - 0387-5016
VL - 57
SP - 3110
EP - 3116
JO - Transactions of the Japan Society of Mechanical Engineers Series B
JF - Transactions of the Japan Society of Mechanical Engineers Series B
IS - 541
ER -