Analysis and optimization of guide vane jets to decrease the unsteady load on mixed flow hydroturbine runner blades

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

Research output: Contribution to conferencePaper

7 Scopus citations

Abstract

As the runner blades of a mixed-flow hydroturbine pass through the wakes created from the guide vanes, they experience a significant change in absolute velocity, flow angle, and pressure. The concept of adding water jets to the trailing-edge of the guide vanes is proposed as a method for reducing the dynamic load on the hydroturbine runner blades. Computational experiments show a decrease in velocity variation experienced at the location of the runner blades with the addition of the jets. The decrease in velocity variation should result in a reduction in dynamic load on the runner blades. A simple optimization procedure was performed to determine the optimal jet flow rate to negate the effect of the wake deficit.

Original languageEnglish (US)
StatePublished - 2012
Event7th International Conference on Computational Fluid Dynamics, ICCFD 2012 - Big Island, United States
Duration: Jul 9 2012Jul 13 2012

Conference

Conference7th International Conference on Computational Fluid Dynamics, ICCFD 2012
CountryUnited States
CityBig Island
Period7/9/127/13/12

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Computational Mechanics
  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics

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    Lewis, B. J., Cimbala, J. M., & Wouden, A. M. (2012). Analysis and optimization of guide vane jets to decrease the unsteady load on mixed flow hydroturbine runner blades. Paper presented at 7th International Conference on Computational Fluid Dynamics, ICCFD 2012, Big Island, United States.