YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • ASME
    • Journal of Turbomachinery
    • View Item
    •   YE&T Library
    • ASME
    • Journal of Turbomachinery
    • View Item
    • All Fields
    • Source Title
    • Year
    • Publisher
    • Title
    • Subject
    • Author
    • DOI
    • ISBN
    Advanced Search
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Archive

    A 3D Compressible Flow Model for Weak Rotating Waves in Vaneless Diffusers—Part I: The Model and Mach Number Effects

    Source: Journal of Turbomachinery:;2012:;volume( 134 ):;issue: 004::page 41010
    Author:
    Hua Chen
    ,
    Feng Shen
    ,
    Xiao-Cheng Zhu
    ,
    Zhao-Hui Du
    DOI: 10.1115/1.4003655
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A three-dimensional compressible flow model is presented to study the occurrence of weak rotating waves in vaneless diffusers of centrifugal compressors. The diffuser considered has two parallel walls, and the undisturbed flow is assumed to be circumferentially uniform, isentropic, and to have no axial velocity. Linearized 3D compressible Euler equations were casted on a rotating coordinate system traveling at the same angular speed as the wave cells. A uniform static pressure at the outlet of the diffuser was imposed. Complex functions of the solutions to the equations were obtained by a second-order finite difference method and the singular value decomposition technique. The influences of the inlet Mach number of undisturbed flow, inlet spanwise distribution of undisturbed radial velocity, and diffuser radius ratio on the rotating waves were studied and results show that (1) the critical flow angle and rotating wave speed are both affected by the Mach number. However, the angle only increases slightly with the Mach number while the wave speed increases rapidly with the Mach number; (2) inlet distribution has minor influences on diffuser instability but the wave speed increases with the inlet distortion; (3) diffuser instability increases rapidly and the wave speed decreases quickly with the diffuser radius ratio; and (4) backward traveling rotating wave may occur if diffuser is sufficiently long and the inlet Mach number is sufficiently small.
    keyword(s): Flow (Dynamics) , Mach number , Waves , Diffusers , Compressible flow , Equations AND Vaneless diffusers ,
    • Download: (778.3Kb)
    • Show Full MetaData Hide Full MetaData
    • Get RIS
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      A 3D Compressible Flow Model for Weak Rotating Waves in Vaneless Diffusers—Part I: The Model and Mach Number Effects

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/150492
    Collections
    • Journal of Turbomachinery

    Show full item record

    contributor authorHua Chen
    contributor authorFeng Shen
    contributor authorXiao-Cheng Zhu
    contributor authorZhao-Hui Du
    date accessioned2017-05-09T00:55:12Z
    date available2017-05-09T00:55:12Z
    date copyrightJuly, 2012
    date issued2012
    identifier issn0889-504X
    identifier otherJOTUEI-926077#041010_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/150492
    description abstractA three-dimensional compressible flow model is presented to study the occurrence of weak rotating waves in vaneless diffusers of centrifugal compressors. The diffuser considered has two parallel walls, and the undisturbed flow is assumed to be circumferentially uniform, isentropic, and to have no axial velocity. Linearized 3D compressible Euler equations were casted on a rotating coordinate system traveling at the same angular speed as the wave cells. A uniform static pressure at the outlet of the diffuser was imposed. Complex functions of the solutions to the equations were obtained by a second-order finite difference method and the singular value decomposition technique. The influences of the inlet Mach number of undisturbed flow, inlet spanwise distribution of undisturbed radial velocity, and diffuser radius ratio on the rotating waves were studied and results show that (1) the critical flow angle and rotating wave speed are both affected by the Mach number. However, the angle only increases slightly with the Mach number while the wave speed increases rapidly with the Mach number; (2) inlet distribution has minor influences on diffuser instability but the wave speed increases with the inlet distortion; (3) diffuser instability increases rapidly and the wave speed decreases quickly with the diffuser radius ratio; and (4) backward traveling rotating wave may occur if diffuser is sufficiently long and the inlet Mach number is sufficiently small.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA 3D Compressible Flow Model for Weak Rotating Waves in Vaneless Diffusers—Part I: The Model and Mach Number Effects
    typeJournal Paper
    journal volume134
    journal issue4
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.4003655
    journal fristpage41010
    identifier eissn1528-8900
    keywordsFlow (Dynamics)
    keywordsMach number
    keywordsWaves
    keywordsDiffusers
    keywordsCompressible flow
    keywordsEquations AND Vaneless diffusers
    treeJournal of Turbomachinery:;2012:;volume( 134 ):;issue: 004
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian