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    Numerical Simulation of the Transient Flow in a Radial Flow Pump during Stopping Period

    Source: Journal of Fluids Engineering:;2011:;volume( 133 ):;issue: 011::page 111101
    Author:
    J. Liu
    ,
    Z. Li
    ,
    L. Wang
    ,
    L. Jiao
    DOI: 10.1115/1.4005137
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Three-dimensional (3-D) unsteady incompressible and non-cavitating flow in a radial flow pump during the rapid stopping period was numerically studied by CFD. The dynamic mesh (DM) method combined with non-conformal grid boundaries was applied to simulate the transient stopping process. In order to exclude the uncertainty of the unsteady inlet and outlet boundaries, a loop pumping system was established, which was composed of pipes, a reservoir with an air part on the top, and a driving pump. Simulations were performed based on the standard k-ɛ turbulence model and volume of fluid (VOF) model. Results showed that the air part in the reservoir approximated real conditions when using the VOF model. Pressure fluctuations were reduced and a sharp increase of pressure at the inlet of the pump was observed at the beginning of the stopping period. Specific transient characteristics, such as the flow-rate, head and efficiency, were analyzed during the deceleration period and compared with corresponding quasi-steady results. The deviation of the quasi-steady hypothesis in predicting the transient stopping process of radial flow pumps is thought to be caused by differences in the predicted vortex in the impeller. The transient curve showing the relationship between the instantaneous flow coefficient and total pressure rise coefficient was analyzed and compared with the quasi-steady curve. The two curves had a crossover point when the stall just occurs in the impeller during the transient process. Simulation results were also compared and validated using published data.
    keyword(s): Flow (Dynamics) , Computer simulation , Pumps , Radial flow , Pressure , Impellers , Fluids , Engineering simulation AND Reservoirs ,
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      Numerical Simulation of the Transient Flow in a Radial Flow Pump during Stopping Period

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    http://yetl.yabesh.ir/yetl1/handle/yetl/146238
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    • Journal of Fluids Engineering

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    contributor authorJ. Liu
    contributor authorZ. Li
    contributor authorL. Wang
    contributor authorL. Jiao
    date accessioned2017-05-09T00:44:08Z
    date available2017-05-09T00:44:08Z
    date copyrightNovember, 2011
    date issued2011
    identifier issn0098-2202
    identifier otherJFEGA4-27497#111101_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/146238
    description abstractThree-dimensional (3-D) unsteady incompressible and non-cavitating flow in a radial flow pump during the rapid stopping period was numerically studied by CFD. The dynamic mesh (DM) method combined with non-conformal grid boundaries was applied to simulate the transient stopping process. In order to exclude the uncertainty of the unsteady inlet and outlet boundaries, a loop pumping system was established, which was composed of pipes, a reservoir with an air part on the top, and a driving pump. Simulations were performed based on the standard k-ɛ turbulence model and volume of fluid (VOF) model. Results showed that the air part in the reservoir approximated real conditions when using the VOF model. Pressure fluctuations were reduced and a sharp increase of pressure at the inlet of the pump was observed at the beginning of the stopping period. Specific transient characteristics, such as the flow-rate, head and efficiency, were analyzed during the deceleration period and compared with corresponding quasi-steady results. The deviation of the quasi-steady hypothesis in predicting the transient stopping process of radial flow pumps is thought to be caused by differences in the predicted vortex in the impeller. The transient curve showing the relationship between the instantaneous flow coefficient and total pressure rise coefficient was analyzed and compared with the quasi-steady curve. The two curves had a crossover point when the stall just occurs in the impeller during the transient process. Simulation results were also compared and validated using published data.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNumerical Simulation of the Transient Flow in a Radial Flow Pump during Stopping Period
    typeJournal Paper
    journal volume133
    journal issue11
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.4005137
    journal fristpage111101
    identifier eissn1528-901X
    keywordsFlow (Dynamics)
    keywordsComputer simulation
    keywordsPumps
    keywordsRadial flow
    keywordsPressure
    keywordsImpellers
    keywordsFluids
    keywordsEngineering simulation AND Reservoirs
    treeJournal of Fluids Engineering:;2011:;volume( 133 ):;issue: 011
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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