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Cavitation in Pump Inducer with Axi-asymmetrical Inlet Plate Observed by Multi-cameras

Kim, Jun-Ho    (Hydro Research Part / R&D Center, Hyosung EBARA Co., Ltd.   ); Atono, Takashi    (Department of Processing Information Engineering, Kyushu Polytechnic College   ); Ishizaka, Koichi    (Department of Mechanical Engineering Science, Kyushu University   ); Watanabe, Satoshi    (Department of Mechanical Engineering Science, Kyushu University   ); Furukawa, Akinori    (Department of Mechanical Engineering Science, Kyushu University  );
  • 초록

    The attachment of inducer in front of main impeller is a powerful method to improve cavitation performance; however, cavitation surge oscillation with low frequency occurs with blade cavity growing to each throat section of blade passage simultaneously. Then, one conceptual method of installing suction axi-asymmetrical plate has been proposed so as to keep every throat passage away from being unstable at once, and the effect on suppression of the oscillation were investigated. In the present study, cavitation behaviors in the inducer is observed with distributing multi-cameras circumferentially, recording simultaneously and reconstructing multi-photos on one plane field as moving a linear cascade. Observed results are utilized for discussion with other measuring results as casing wall pressure distribution. Then the suppression mechanism of oscillation by installing axi-asymmetrical inlet plate will be clarified in more details.


  • 주제어

    Pump inducer .   Cavitation surge suppression .   Axi-asymmetrical inlet plate .   Multi-cameras observation system.  

  • 참고문헌 (6)

    1. Acosta, A. J., 1958, “An Experimental Study of Cavitating Inducers, Proc. 2nd Symp. Naval Hydrodynamics,” ONR/ACR-38, (1958), pp. 537-557. 
    2. Jacobsen, J. K., 1971, “Liquid Rocket Engine Turbo-pump Inducers,” NASA SP-8052. 
    3. Takamatsu, Y., Furukawa, A. and Ishizaka, K., 1984, “Method of Estimation of Required NPSH of Centrifugal Pump with Inducer,” Proc. 1st China-Japan Joint Conference on Hydraulic Machinery and Equipment, pp. 253-261. 
    4. Kamijo, K., Yoshida, M. and Tsujimoto, Y., 1993, “Hydraulic and Mechanical Performance of LE-7 LOX Pump Inducer,” AIAA Journal of Propulsion and Power, Vol.9, pp. 819-827. 
    5. Furukawa, A., Atono, T., Ishizaka, K., Watanabe, S., 2004, “Experimental Study of Cavitation Induced Oscillation in Flat Plate Helical Inducer with Various Blade Angles,” Trans.JSME, 70-697,pp. 2325-2331 (in Japanese). 
    6. Watanabe, S., Enomoto, N., Ishizaka, K., Furukawa, A., Kim, J.-H., 2004, “Suppression of Cavitation Surge of a Helical Inducer Occurring in Partial Flow Conditions,” Turbomachinery, 32-2,pp. 94-100 (in Japanese). 

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