Investigation of distributor vane jets to decrease the unsteady load on hydro turbine runner blades

B. J. Lewis, J. M. Cimbala, A. M. Wouden

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations

Abstract

As the runner blades of a Francis hydroturbine pass though the wakes created from the wicket gates, they experience a significant change in absolute velocity, flow angle, and pressure. The concept of adding jets to the trailing edge of the wicket gates is proposed as a method for reducing the dynamic load on the hydroturbine runner blades. Computational experiments show a decrease in velocity variation experienced by the runner blade with the addition of the jets. The decrease in velocity variation resulted in a 43% decrease in global torque variation at the runner passing frequency. However, an increased variation was observed at the wicket gate passing frequency. Also, a 5.7% increase in average global torque was observed with the addition of blowing from the trailing-edge of the wicket gates.

Original languageEnglish (US)
Article number022006
JournalIOP Conference Series: Earth and Environmental Science
Volume15
Issue numberPART
DOIs
StatePublished - 2012
Event26th IAHR Symposium on Hydraulic Machinery and Systems - Beijing, China
Duration: Aug 19 2012Aug 23 2012

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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