Cavitation at inner turbine runner

Innovative visualisation

Description

In this study, the design of the FL_SUP SGI TP001-31-001-01 head cover enables the observation of both the pressure and suction side cavitations in turbine mode thanks to its large viewing windows (SGI TP01 92-001-01). Users have a direct view of the region between the gate vane and the runner inner. Excellent pictures of the cavitations have been achieved by associating a high resolution camera with a lighting system. For cavitation at the runner suction side inner, 2 kinds of cavitation can be seen. A mapping of these cavitation limits was completed and Etasigma curves were performed at 2 operating points.

TRL SCALE

TRL_SCALE_6_9_SUPERGRID_INSTITUTE

Advantages

  • Innovative study: first time observation
  • Reducing time for a next complete study

Applications

  • Design of pump-turbine runner

Deliverables

  • Drawing and Creo model of :
    • FL_SUP SGI TP001-31-001-01 head cover
    • SGI TP01 92-001-01 standard windows
  • Technical and test report including:
    • all observations
    • all limits
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