Experimental Considerations in an Approximate Method for Estimating the Blade Performance of Darrieus-Type Cross-Flow Water Turbines

Yasuo Takamatsu, Akinori Furukawa, Kazuki Takenouchi, Kusuo Ōkuma

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3110-3116
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume57
Issue number541
DOIs
Publication statusPublished - 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

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