Parametric Excited Pressure Oscillations In Hydraulic Systems

Parametric Excited Pressure Oscillations In Hydraulic Systems

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The first kind of mathematical modelling is based on the method of characteristic, having implied the transfer equations of a hydraulic machine – water turbine. This mathematical model allows time-dependant change of system parameters such as cavitation cavern volume.In this manner the parametric excited pressure oscillations can be analysed taking into account a harmonic excitation. Results of this analysis are compared to pressure oscillations measured at the partial load operation of a pump turbine.

The first kind of mathematical modelling is based on the method of characteristic, having implied the transfer equations of a hydraulic machine – water turbine. This mathematical model allows time-dependant change of system parameters such as cavitation cavern volume.In this manner the parametric excited pressure oscillations can be analysed taking into account a harmonic excitation. Results of this analysis are compared to pressure oscillations measured at the partial load operation of a pump turbine.

parametric oscillationssystem parameters

KOUTNÍK, J.

26.06.2001

NTNU Norwegian University of Science and Technology

Trondheim, Norway

Norwegian University of Science and Technology

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