Side-wall effect of runner casing on performance of Darrieus-type hydro turbine with inlet nozzle for extra-low head utilization

Kai Shimokawa, Akinori Furukawa, Kusuo Okuma, Daisuke Matsushita, Satoshi Watanabe

Research output: Contribution to journalArticle

7 Citations (Scopus)


A ducted Darrieus-type turbine has been proposed for hydropower utilization of extra-low head less than 2 m. Though the hydro turbine system, in general, might consist of an intake, runner casing section and a draft tube for higher efficiency operation, it was clarified in previous experiment that there was no need of the side-walls of runner casing section and a draft-tube for keeping the efficiency high in the case of duct with an inlet nozzle. This would yield a simplification of the structure of the turbine system. In order to reconfirm this result for large-sized turbine with 560 mm×300 mm duct, instead of small-sized one with 400 mm×200 mm duct, the side-wall effect on turbine performance was experimentally investigated for three- or four-bladed runner. In the present paper, the experimental results are shown with considering flow behaviors in the runner section.

Original languageEnglish
Pages (from-to)93-99
Number of pages7
JournalScience China Technological Sciences
Issue number1
Publication statusPublished - Jan 1 2010


All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

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