Experimental Studies on a Preferable Blade Profile for High Efficiency and the Blade Characteristics of Darrieus-Type Cross-Flow Water Turbines

Yasuo Takamatsu, Akinori Furukawa, Kusuo Okuma, Kazuki Takenouchi

Research output: Contribution to journalArticle


Fluid forces and moment acting on a blade of the Darrieus-type runner were measured in addition to the blade performance. The characteristics for various type of blades were evaluated from the measured data with theoretical considerations in an inviscid flow. Some features of those characteristics, including the dynamic effects caused by an unsteady relative flow around the Darrieus-blade, are shown in the present paper. For high efficiency, a noncambered thin blade with relatively long chord length is recommended. Its characteristics are high lift slope, high lift at zero angle of attack and relatively low drag in a wide no-stall region of attack angles. It should also be set tangent to the runner pitch-circle at the 50% chord point of the blade.

Original languageEnglish
Pages (from-to)2409-2415
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Issue number528
Publication statusPublished - Jan 1 1990
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

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