Prediction of sheet cavitation in a centrifugal pump impeller with the three-dimensional potential-flow model

R.J.H. Dijkers*, B. Fumex, J.G.H. Op de Woerd, N.P. Kruyt, H.W.M. Hoeijmakers

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    4 Citations (Scopus)

    Abstract

    The occurrence of cavitation is one of the main limiting factors in the operation and design of centrifugal pumps. In this paper a model for the prediction of sheet cavitation is described. This model has been implemented in a three-dimensional finite-element package, employing the potential-flow approximation of the governing flow equations. At the interface between vapor and liquid, pressure equilibrium is required. The closure region of the cavity is modeled as the collapse of a bubble, whose motion is described by the Rayleigh-Plesset equation. The effect of displacement of the flow due to presence of the sheet cavity is incorporated by the transpiration technique. This is a linearised approach which is well-known from techniques for coupling inviscid-flow methods to boundary-layer methods. The model gives the location of the sheet cavity (if present); its length is thus also predicted. The model has been validated by comparing sheet cavitation at the blades of a centrifugal pump impeller, obtained from CFD-computations and from visual observations in a model test.

    Original languageEnglish
    Title of host publication2005 ASME Fluids Engineering Division Summer Meeting, FEDSM2005
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Pages1233-1238
    Number of pages6
    ISBN (Electronic)0-7918-3760-2
    ISBN (Print)0791837602, 9780791837603
    DOIs
    Publication statusPublished - 1 Dec 2005
    Event2005 ASME Fluids Engineering Division Summer Meeting, FEDSM 2005 - Houston, United States
    Duration: 19 Jun 200523 Jun 2005

    Conference

    Conference2005 ASME Fluids Engineering Division Summer Meeting, FEDSM 2005
    Abbreviated titleFEDSM
    CountryUnited States
    CityHouston
    Period19/06/0523/06/05

    Keywords

    • Cavitation
    • Centrifugal pumps
    • CFD analysis
    • NPSH
    • Potential flow

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