Pressure fluctuations around volute tongue of centrifugal pump

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    Abstract

    ©, 2015, Chinese Society of Agricultural Machinery. All right reserved. Pressure fluctuations inside centrifugal pump, especially those near the volute tongue, are the primary excitations to pump vibration and noise. The performance and pressure fluctuations of a centrifugal pump running at different flow rates and variable speeds were experimentally studied. The pump performance measurement showed that the pump worked at low flow rate condition, and the pump hydraulic performance varied with the rotational speed according to one-dimensional design theory. The pressure fluctuation measurement showed that discrete components were the main contributions in the pressure fluctuation spectra, especially the blade passing frequency (BPF) and its second harmonic. The overall strength of pressure fluctuation was approximately 1% of the reference dynamic pressure, and it varied in a quadratic function form with rotary speed. At a constant rotation speed, the pressure fluctuation magnitude at the outlet side of volute tongue had no obvious change with the decrease of flow rate, but places at the inner side and tongue tip experienced noticeable increase at sufficiently low flow rates owing to the pressure fluctuations below BPF. The study provided a basis for future study of flow-induced pump vibration and noise.
    Original languageEnglish
    Pages (from-to)92-96
    JournalNongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
    Volume46
    Issue number6
    DOIs
    Publication statusPublished - 2015

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    centrifugal pumps
    Centrifugal pumps
    tongue
    Tongue
    Pressure
    pumps
    Pumps
    Flow rate
    Vibration
    vibration
    Noise
    Agricultural machinery
    agricultural machinery and equipment
    strength (mechanics)
    fluid mechanics
    Hydraulics

    Cite this

    @article{286351e6304540deacad95ec246699c2,
    title = "Pressure fluctuations around volute tongue of centrifugal pump",
    abstract = "{\circledC}, 2015, Chinese Society of Agricultural Machinery. All right reserved. Pressure fluctuations inside centrifugal pump, especially those near the volute tongue, are the primary excitations to pump vibration and noise. The performance and pressure fluctuations of a centrifugal pump running at different flow rates and variable speeds were experimentally studied. The pump performance measurement showed that the pump worked at low flow rate condition, and the pump hydraulic performance varied with the rotational speed according to one-dimensional design theory. The pressure fluctuation measurement showed that discrete components were the main contributions in the pressure fluctuation spectra, especially the blade passing frequency (BPF) and its second harmonic. The overall strength of pressure fluctuation was approximately 1{\%} of the reference dynamic pressure, and it varied in a quadratic function form with rotary speed. At a constant rotation speed, the pressure fluctuation magnitude at the outlet side of volute tongue had no obvious change with the decrease of flow rate, but places at the inner side and tongue tip experienced noticeable increase at sufficiently low flow rates owing to the pressure fluctuations below BPF. The study provided a basis for future study of flow-induced pump vibration and noise.",
    author = "J. Cai and Jie Pan and A. Guzzomi",
    year = "2015",
    doi = "10.6041/j.issn.1000-1298.2015.06.014",
    language = "English",
    volume = "46",
    pages = "92--96",
    journal = "Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery",
    issn = "1000-1298",
    publisher = "Chinese Society of Agricultural Machinery",
    number = "6",

    }

    TY - JOUR

    T1 - Pressure fluctuations around volute tongue of centrifugal pump

    AU - Cai, J.

    AU - Pan, Jie

    AU - Guzzomi, A.

    PY - 2015

    Y1 - 2015

    N2 - ©, 2015, Chinese Society of Agricultural Machinery. All right reserved. Pressure fluctuations inside centrifugal pump, especially those near the volute tongue, are the primary excitations to pump vibration and noise. The performance and pressure fluctuations of a centrifugal pump running at different flow rates and variable speeds were experimentally studied. The pump performance measurement showed that the pump worked at low flow rate condition, and the pump hydraulic performance varied with the rotational speed according to one-dimensional design theory. The pressure fluctuation measurement showed that discrete components were the main contributions in the pressure fluctuation spectra, especially the blade passing frequency (BPF) and its second harmonic. The overall strength of pressure fluctuation was approximately 1% of the reference dynamic pressure, and it varied in a quadratic function form with rotary speed. At a constant rotation speed, the pressure fluctuation magnitude at the outlet side of volute tongue had no obvious change with the decrease of flow rate, but places at the inner side and tongue tip experienced noticeable increase at sufficiently low flow rates owing to the pressure fluctuations below BPF. The study provided a basis for future study of flow-induced pump vibration and noise.

    AB - ©, 2015, Chinese Society of Agricultural Machinery. All right reserved. Pressure fluctuations inside centrifugal pump, especially those near the volute tongue, are the primary excitations to pump vibration and noise. The performance and pressure fluctuations of a centrifugal pump running at different flow rates and variable speeds were experimentally studied. The pump performance measurement showed that the pump worked at low flow rate condition, and the pump hydraulic performance varied with the rotational speed according to one-dimensional design theory. The pressure fluctuation measurement showed that discrete components were the main contributions in the pressure fluctuation spectra, especially the blade passing frequency (BPF) and its second harmonic. The overall strength of pressure fluctuation was approximately 1% of the reference dynamic pressure, and it varied in a quadratic function form with rotary speed. At a constant rotation speed, the pressure fluctuation magnitude at the outlet side of volute tongue had no obvious change with the decrease of flow rate, but places at the inner side and tongue tip experienced noticeable increase at sufficiently low flow rates owing to the pressure fluctuations below BPF. The study provided a basis for future study of flow-induced pump vibration and noise.

    U2 - 10.6041/j.issn.1000-1298.2015.06.014

    DO - 10.6041/j.issn.1000-1298.2015.06.014

    M3 - Article

    VL - 46

    SP - 92

    EP - 96

    JO - Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

    JF - Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

    SN - 1000-1298

    IS - 6

    ER -