The flow field in a centrifugal pump with a large tongue gap and back blades

Jian Cheng Cai, Jie Pan, Andrew Guzzomi

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    © 2014, The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg. In this paper, the unsteady 3-D turbulent flow fields in an end-suction centrifugal pump with a vaneless volute are studied numerically at three different rotation speeds. The unshrouded impeller of the pump, as a reduced diameter version of the original full-size impeller, has five backswept blades and five pump-out blades. The results show that the flow rate and pressure vary with the rotational speed according to the similarity law, and the normalized internal flow fields at all speeds are very similar. Due to the reduced impeller diameter, the pump efficiency is relatively low. Flows discharged from the front and back blade passages interfere with each other and swirling motion exists in the volute. The pressure fluctuations on the casing wall near the impeller outlet are extracted, and their spectra show that the component at the blade passing frequency was prominent. This study sheds some light on the characteristics of the internal unsteady flow of a centrifugal pump at different rotational speeds, and forms a basis for future study of flow induced pump vibration and noise.
    Original languageEnglish
    Pages (from-to)4455-4464
    JournalJournal of Mechanical Science and Technology
    Volume28
    Issue number11
    DOIs
    Publication statusPublished - 2014

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    Centrifugal pumps
    Tongue
    Flow fields
    Pumps
    Pressure
    Suction
    Berlin
    Vibration
    Turbomachine blades
    Noise
    Unsteady flow
    Turbulent flow
    Flow rate
    Engineers

    Cite this

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    abstract = "{\circledC} 2014, The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg. In this paper, the unsteady 3-D turbulent flow fields in an end-suction centrifugal pump with a vaneless volute are studied numerically at three different rotation speeds. The unshrouded impeller of the pump, as a reduced diameter version of the original full-size impeller, has five backswept blades and five pump-out blades. The results show that the flow rate and pressure vary with the rotational speed according to the similarity law, and the normalized internal flow fields at all speeds are very similar. Due to the reduced impeller diameter, the pump efficiency is relatively low. Flows discharged from the front and back blade passages interfere with each other and swirling motion exists in the volute. The pressure fluctuations on the casing wall near the impeller outlet are extracted, and their spectra show that the component at the blade passing frequency was prominent. This study sheds some light on the characteristics of the internal unsteady flow of a centrifugal pump at different rotational speeds, and forms a basis for future study of flow induced pump vibration and noise.",
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    The flow field in a centrifugal pump with a large tongue gap and back blades. / Cai, Jian Cheng; Pan, Jie; Guzzomi, Andrew.

    In: Journal of Mechanical Science and Technology, Vol. 28, No. 11, 2014, p. 4455-4464.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - The flow field in a centrifugal pump with a large tongue gap and back blades

    AU - Cai, Jian Cheng

    AU - Pan, Jie

    AU - Guzzomi, Andrew

    PY - 2014

    Y1 - 2014

    N2 - © 2014, The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg. In this paper, the unsteady 3-D turbulent flow fields in an end-suction centrifugal pump with a vaneless volute are studied numerically at three different rotation speeds. The unshrouded impeller of the pump, as a reduced diameter version of the original full-size impeller, has five backswept blades and five pump-out blades. The results show that the flow rate and pressure vary with the rotational speed according to the similarity law, and the normalized internal flow fields at all speeds are very similar. Due to the reduced impeller diameter, the pump efficiency is relatively low. Flows discharged from the front and back blade passages interfere with each other and swirling motion exists in the volute. The pressure fluctuations on the casing wall near the impeller outlet are extracted, and their spectra show that the component at the blade passing frequency was prominent. This study sheds some light on the characteristics of the internal unsteady flow of a centrifugal pump at different rotational speeds, and forms a basis for future study of flow induced pump vibration and noise.

    AB - © 2014, The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg. In this paper, the unsteady 3-D turbulent flow fields in an end-suction centrifugal pump with a vaneless volute are studied numerically at three different rotation speeds. The unshrouded impeller of the pump, as a reduced diameter version of the original full-size impeller, has five backswept blades and five pump-out blades. The results show that the flow rate and pressure vary with the rotational speed according to the similarity law, and the normalized internal flow fields at all speeds are very similar. Due to the reduced impeller diameter, the pump efficiency is relatively low. Flows discharged from the front and back blade passages interfere with each other and swirling motion exists in the volute. The pressure fluctuations on the casing wall near the impeller outlet are extracted, and their spectra show that the component at the blade passing frequency was prominent. This study sheds some light on the characteristics of the internal unsteady flow of a centrifugal pump at different rotational speeds, and forms a basis for future study of flow induced pump vibration and noise.

    U2 - 10.1007/s12206-014-1013-6

    DO - 10.1007/s12206-014-1013-6

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    JF - Journal of Mechanical Science and Technology

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