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A New Concept of Hydraulic Design of Water Turbine Runners

Vesely, Jindrich    (Hydraulic Research Department, CKD Blansko Engineering   ); Pochyly, Frantisek    (Mechanical Engineering, Technical University of Brno   ); Obrovsky, Jiri    (Hydraulic Research Department, CKD Blansko Engineering   ); Mikulasek, Josef    (Hydraulic Research Department, CKD Blansko Engineering  );
  • 초록

    Vibrations at different frequencies with a different intensity as well as a pressure pulsation with different parameters are two phenomena which can be observed at different water turbines. Due to the vibration and the pressure pulsation some restrictions of water turbine operation range are applied. Similar problems with the efficiency level in a wide water turbine operation range are the basic problems which are solved for ages. A theoretical and practical solution of the above mentioned problems is very much time and money consuming. The paper describes a new theoretical solution of the excitation and pressure pulsation decrease as well as extension of the operational range with high efficiency level. The new concept to decrease the vibrations and pressure pulsations is based on a heterogeneous runner blade geometry generation. The new concept of the runner geometry design was numerically tested at a low specific speed pump turbine, see Fig. 1, and basic points of the concept are presented in this paper.


  • 주제어

    Pressure pulsation .   Detuning .   Heterogeneous blade passages.  

  • 참고문헌 (9)

    1. Hartog D., “Mechanical Vibrations,” McGRAW-HILL, New York, 1956. 
    2. Chen Y. N., “Wasserdruckschwingungen in Spiralgehausen von Speicherpumpen,” Sonderdruck aus Forschungsheft Sulzer, 1961, p. 14. 
    3. Nechleba M., “Wasserdruckschwingungen in Druckrohrleitungen von radialen hydraulischen Maschinen,” besonders Pumpen, Maschinenbautechnik 21, 1972, S. 113 - 116 
    4. Dubas M., “Ueber die Erregung infolge der Periodizitat von Turbomaschinen,” Ingenier-Archiv 54, 1984, S. 413 - 426 
    5. Dorfler P., “On the role of phase resonance in vibrations caused by blade passage in radial hydraulic turbomaschines,” 12 th IAHR Symposium, Stirling, 1984, pp. 228-241. 
    6. PULPITEL L., “High frequency pressure oscillations and rotor vibrations of a pump turbine,” Conference HYDFORORUM, Polish Academy of Science, Gdansk, Poland, 1985. 
    7. Tanaka H., “Vibration behaviour and dynamic stress of runners of very high head reversible pump-turbines,” IAHR Symposium, Belgrade Yugoslavia Symposium, Paper U2, 1990. 
    8. www.ansys.com 
    9. Sick M., “Numerical prediction of flow induced dynamic loading water turbines: recent development and results,” Hydro 2007, Granada, Spain, 2007. 

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