Influence of the Pump-Turbine Guide Vanes Vibrations on the Pressure Fluctuations in the Rotor-Stator Vaneless Gap

We investigate the Rotor-Stator Interaction in a pump-turbine reduced scale model by considering fluid-structure coupling. The pressure fluctuations amplitude in the rotor-stator vaneless gap has generally been shown to increase linearly with the operating specific energy, subjecting the pump-turbines components to high stresses at high head operations. However, the present paper shows that the guide vanes vibratory properties may have a strong influence on the amplitude of the pressure fluctuations which are due to the Rotor-Stator Interaction. Thus, their amplitude may locally drop by 50% close to guide vanes reaching resonance.


Published in:
Proceedings of the 4th International Meeting on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems
Presented at:
4th IAHR International Meeting on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems, Belgrade, Serbia, October 26-28, 2011
Year:
2011
Keywords:
Note:
Hydrodyna
Laboratories:




 Record created 2011-06-30, last modified 2018-01-28

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