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International journal of fluid machinery and systems v.3 no.1, 2010년, pp.80 - 90   피인용횟수: 1

Experimental Study and Numerical Simulation of Cavity Oscillation in a Diffuser with Swirling Flow

Chen, Chang-Kun    (Graduate School of Engineering Science, Osaka University   ); Nicolet, Christophe    (Laboratory for Hydraulic Machines, EPFL - Swiss Federal Institute of Technology   ); Yonezawa, Koichi    (Graduate School of Engineering Science, Osaka University   ); Farhat, Mohamed    (Laboratory for Hydraulic Machines, EPFL - Swiss Federal Institute of Technology   ); Avellan, Francois    (Laboratory for Hydraulic Machines, EPFL - Swiss Federal Institute of Technology   ); Miyazawa, Kazuyoshi    (Nagasaki R&D Center, Mitsubishi Heavy Industries, LTD   ); Tsujimoto, Yoshinobu    (Laboratory for Hydraulic Machines, EPFL - Swiss Federal Institute of Technology  );
  • 초록

    The cavity oscillation with swirling flow in hydraulic power generating systems was studied by a simple experiment and numerical simulation. Several types of fluctuation were observed in the experiment, including the cavitation surge caused by the diffuser effect and the vortex precession by the swirling flow. Both cavitation surge and vortex precession were simulated by CFD. Detailed flow structure was examined through flow visualization and CFD.


  • 주제어

    Draft tube surge .   diffuser effect .   swirl effect .   cavitation.  

  • 참고문헌 (9)

    1. Nishi, M., “Surging Characteristics of Conical and Elbow Type Draft Tubes,” Proceeding of the 12th IAHR Symposium on Hydraulic Machinery and System, Stirling, 1984, pp. 272-283. 
    2. Nishi, M., Matsunaga, S., Kubota, T., Senoo, Y., “Flow Regimes in an Elbow-Type Draft Tube,” Proceeding of the 11th IAHR Symposium on Hydraulic Machinery and System, Amsterdam, 1982, pp. 1-13, paper 38. 
    3. Nishi, M., Wang, X., Okamoto, M., Matsunaga, S., “Further Investigation on the Pressure Fluctuations Caused by Cavitated Vortex Rope in an Elbow Draft Tube,” In Cavitation and Gas Fluid Flow Machinery and Devices (1994), ASME, pp. 63-70. 
    4. Prenat, J-E., Jacob, T., “Investigating the Behavior at High Load of a Francis Turbine Model,” 13th IAHR Symposium, Montreal, 1986. 
    5. Arzola, F., Azuaje, C., Zambrano, P., Gulbrandsen, G., “Undesired Power Oscillations at High Load in Large Francis Turbines. Experimental Study and Solution,” 23rd IAHR Symposium, Yokohama, 2006 
    6. Koutnik, J., Pulpitel, L., “Modeling of the Francis Turbine Full-Load Surge,” Modeling, Testing and Monitoring for Hydro Power Plants, Lausanne, 1996. 
    7. Koutnik, J., Nicolet, C., A.Schoul, G., Avellen, F., “Overload Surge Event in a Pumped- Storage Power Plant,” 23rd IAHR Symposium, Yokohama, 2006. 
    8. Chen, C., Nicolet, C., Yonezawa, K., Farhat, M., Avellen, F., Tsujimoto, Y., “One-Dimensional Analysis of Full Load Draft Tube Surge,” ASME Journal of Fluids Engineering, vol.130, Issue 4, 041106. 
    9. Chen, C., Nicolet, C., Yonezawa, K., Farhat, M., Avellen, F., Miyazawa, K., Tsujimoto, Y., “Experimental Study and Numerical Simulation of Cavity Oscillation in a Conical Diffuser,” Submitted to International Journal of Fluid Machinery and System, 2010.     
  • 이 논문을 인용한 문헌 (1)

    1. 2012. "" International journal of fluid machinery and systems, 5(4): 152~160     

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