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  1. HydroCen Research Turbine and generators
  2. 2.1 Variable speed operation
  3. Resonance and pressure pulsations in High Head Francis Runner

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Resonance and pressure pulsations in High Head Francis Runner

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  • Hydropower structures
  • Turbine and generators
    • 2.1 Variable speed operation
      • High-head Francis turbine for variable speed operation
      • Resonance and pressure pulsations in High Head Francis Runner
      • Frequency converter solutions and control methods for variable speed operation of pump storage plant
    • 2.2 Fatigue loads on turbines
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Resonance and pressure pulsations in High Head Francis Runner

Resonance and pressure pulsations in High Head Francis Runner

Resonance and pressure pulsations in High Head Francis Runner

In the last two decades several high head Francis turbines have failed due to rotor-stator interaction (RSI) and resonance issues.Some have failed after a few hours, others have lasted months, or years, before failing. To prevent such failures, it is important to understand the physics behind these failures. Every harmonic oscillating system consists of a natural frequency and a damping. In order to predict the frequency response of such a system, both the natural frequency and damping must be known. Since resonance plays an important role in many of the failures, the effect fl owing water has on the natural frequency and damping is considered a natural starting point in this research.

There is currently no research openly available for all turbine manufacturers to validate their numerical tools with respect to damping and natural frequency. This experiment aims to improve the knowledge on the fluid structure interaction (FSI) between flowing water and oscillating structures, while at the same time providing an open platform to validate numerical tools.

Contact

Contact

Resonance and pressure pulsations in High Head Francis Runner

Bjørn Winther Solemslie

Post doc.

Email: bjorn.w.solemslie@ntnu.no

Supervisor: Ole Gunnar Dahlhaug

NTNU – Norwegian University of Science and Technology

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