Experimental investigation on diffuser rotating stall in a three-stage centrifugal pump

Taiki Takamine, Satoshi Watanabe, Daichi Furukawa, Hiroyoshi Watanabe, Kazuyoshi Miyagawa

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    Rotating stall phenomenon frequently causes the troubles such as vibrations acting on the shaft system and reduces the reliability of turbomachines. In the present study, the diffuser rotating stall in a three-stage centrifugal pump was experimentally studied. Special emphasises were placed on the geometrical conditions; an axial offset of rotor against the stationary part, which might be unavoidable due to accumulation of geometrical tolerances and assembling errors., and the radial clearances of annular leakage paths which increases the thru-flow rate at the impellers and the first and second stage diffusers. As a result, with the rotor axial offset to the suction side, the rotating stall appeared only at the third stage diffuser, while with that to the discharge side, the rotating stall was more significant. By enlarging the leakage flow passages at the inter-stage bush and the balancing flow channel, the onset range of rotating stall became narrower in the first and second stage diffusers, which was well explained by the increase of the thru-flow rate. On the other hand, with the enlarged leakage passage at the liner ring, the onset range

    Original languageEnglish
    Title of host publicationSymposia
    Subtitle of host publicationKeynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Volume1A-2017
    ISBN (Electronic)9780791858042
    DOIs
    Publication statusPublished - 2017 Jan 1
    EventASME 2017 Fluids Engineering Division Summer Meeting, FEDSM 2017 - Waikoloa, United States
    Duration: 2017 Jul 302017 Aug 3

    Other

    OtherASME 2017 Fluids Engineering Division Summer Meeting, FEDSM 2017
    CountryUnited States
    CityWaikoloa
    Period17/7/3017/8/3

    ASJC Scopus subject areas

    • Mechanical Engineering

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  • Cite this

    Takamine, T., Watanabe, S., Furukawa, D., Watanabe, H., & Miyagawa, K. (2017). Experimental investigation on diffuser rotating stall in a three-stage centrifugal pump. In Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery (Vol. 1A-2017). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/FEDSM2017-69386