Numerical and experimental investigation of hydrodynamic forces due to non-uniform suction flow to a mixed-flow pump

B. P.M. Van Esch, N. W.H. Bulten

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

    7 Citations (Scopus)

    Abstract

    This paper presents an investigation of the effect of a nonuniform suction flow on forces on the impeller of a waterjet pump. In such a pump, used for ship propulsion, the nonuniformity of the suction flow is caused by the boundary layer under the hull of the ship and the shape of the inlet duct. The paper covers both experimental and numerical studies. A model of a mixed-flow waterjet pump is built into a closed-loop test rig. In order to measure the instantaneous forces and bending moments on the impeller, a newly designed co-rotating dynamometer is used, which is built between the impeller and the shaft of the pump. The design of the dynamometer will be presented. Various entrance flow distributions to the pump are achieved by means of a device situated in the suction pipe. In this manner the axial velocity at the inlet of the pump is varied between uniform and non-uniform distributions. Results of measurements show the influence of suction flow and blade interaction on forces. Results of experiments are compared with CFD calculations of a waterjet pump installation with similar entrance flow conditions. Quasi-steady calculations are performed for the pump which is equipped with a varied stator bowl. Calculations show a good quantitative agreement with measurements.

    Original languageEnglish
    Title of host publicationProceedings of ASME Fluids Engineering Division Summer Conference, 2005 Symposia, FEDSM2005
    PublisherAmerican Society of Mechanical Engineers
    Pages1203-1209
    Number of pages7
    Volume1B
    ISBN (Print)0791841987, 9780791841983
    DOIs
    Publication statusPublished - 2005
    Event2005 ASME Fluids Engineering Division Summer Meeting, FEDSM2005 - Houston, TX, United States
    Duration: 19 Jun 200523 Jun 2005

    Conference

    Conference2005 ASME Fluids Engineering Division Summer Meeting, FEDSM2005
    Country/TerritoryUnited States
    CityHouston, TX
    Period19/06/0523/06/05

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