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Study on Design of Air-water Two-phase Flow Centrifugal Pump Based on Similarity Law

Matsushita, Naoki    (Department of Mechanical Engineering, Kyushu University   ); Furukawa, Akinori    (Department of Mechanical Engineering, Kyushu University   ); Watanabe, Satoshi    (Department of Mechanical Engineering, Kyushu University   ); Okuma, Kusuo    (Department of Mechanical Engineering, Kyushu University  );
  • 초록

    A conventional centrifugal pump causes a drastic deterioration of air-water two-phase flow performances even at an air-water two-phase flow condition of inlet void fraction less than 10% in the range of relatively low water flow rate. Then we have developed a two-phase flow centrifugal pump which consists of a tandem arrangement of double rotating cascades and blades of outer cascade have higher outlet angle more than $90^{\circ}$ . In design of the two-phase flow pump for various sized and operating conditions, similarity relations of geometric dimensions to hydraulic performances is very useful. The similarity relations of rotational speed, impeller diameter and blade height are investigated for the developed impeller in the present paper. As the results, the similarity law of rotational speed and impeller diameter is clarified experimentally even in two-phase flow condition. In addition, influences of blade height on air-water two-phase flow performances indicate a little difference from the similarity relations.


  • 주제어

    Centrifugal pump .   Air-water two-phase flow .   Pump performance .   Similarity law.  

  • 참고문헌 (7)

    1. Egashira, K., Furukawa, A. et al., 1996, “Backflow in Twin-Screw-Type Multiphase Pump,” Proc. SPE Annual Tech. Conf.,Vol. II, pp. 221-230. 
    2. Minemura, K. et al., 1998, “Effects of Design Parameters on Air-Water Two-phase Flow Performance of a Radial-Flow Pump,” Applied Mech. & Eng., Vol. 3-1, pp. 89-109. 
    3. Furukawa, A. et al., 1999, “Pumping Action of Centrifugal Impeller with Tandem Circular Cascades in Air-Water Two-phaseFlown,” Proc. 3rd ASME/JSME Fluids Eng. Conf., FEDSM99-6773, pp. 1-6. 
    4. Furukawa, A. et al., 2003, “Development of Air/water Two-Phase Flow Centrifugal Pump and Its Operating Characteristics,”Proc, 4th ASME/JSME Fluids Eng. Conf., FEDSM03-45013, pp. 1-6. 
    5. Furukawa, A. et al., 1990, “Studies on Estimating the Performance of Impellers with Cut-Down of the Blade Edge of theCentrifugal Pump by Surface Singularity Method,” JSME Int. J., Ser.II, 33-3, pp. 525-530. 
    6. Furukawa, A. et al., 1996, “Experiments on Air-Water Two-Phase Flow Pump Impeller with Rotating-Stationary Cascades and Recirculating Flow Holes,” JSME Int. J., Ser.B, 39-3, pp. 575-582. 
    7. Matsushita, N., Furukawa, A. et al., 2005, “Influences of Impeller Diameter and Diffuser Blades on Air-Water Two-phase flow Performance of centrifugal pump,” Proc. FEDSM2005 ASME Fluids Engineering Division Summer Meeting and Exhibition. FEDSM2005-77388, pp. 1-6. 

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