Approximate method for estimating the blade performance of Darrieus-type cross-flow water turbines

Akinori Furukawa, Kazuki Takenouchi, Kusuo Okuma, Yasuo Takamatsu

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution


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 Darrieus 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 results, 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 circular motion, and the dynamic effect of the unsteady flow around the Darrieus blade.

Original languageEnglish
Title of host publicationMemoirs of the Kyushu University, Faculty of Engineering
PublisherPubl by Kyushu Univ
Number of pages14
Publication statusPublished - Jun 1992

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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