Experimental study on adjustment of inlet nozzle section to flow rate variation for darrieus-type hydro-turbine

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

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A two dimensional Darrieus-type turbine has been proposed for the hydropower utilization of extra-low head less than 2m. In a practical use of Darrieus-type hydro-turbine, head and flow rate may be varied temporally and seasonally. Considering that the cost advantage is required for the low head hydro turbine system, the Darrieus turbine should be operated with high efficiency in the wider range of flow rate possibly by using an additional device with simpler mechanism. In the present paper, an adjustment of inlet nozzle section by lowering the inlet nozzle height is proposed to obtain the preferable inlet velocity in low flow rate conditions. Effects of resulting spanwise partial inlet flow are investigated. Finally, an effective modification of inlet nozzle height over flow rate variation is shown.

Original languageEnglish
Pages (from-to)30-37
Number of pages8
JournalInternational Journal of Fluid Machinery and Systems
Volume5
Issue number1
DOIs
Publication statusPublished - Mar 2012

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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