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    Measurements of Confined, Coaxial Jet Mixing With Pressure Gradient

    Source: Journal of Fluids Engineering:;1986:;volume( 108 ):;issue: 001::page 39
    Author:
    D. W. Choi
    ,
    F. B. Gessner
    ,
    G. C. Oates
    DOI: 10.1115/1.3242541
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The mixing of a subsonic confined air jet with a coaxial secondary air stream is investigated experimentally. This work differs from previous studies in that emphasis is placed on the effects of an imposed adverse pressure gradient on mixing characteristics in the initial mixing (potential core) and transition regions. The results indicate that the presence of an adverse pressure gradient promotes more rapid mixing and spreading of the shear layer in the initial mixing region, as well as elevated turbulent normal stress and shear stress levels in the outer portion of the mixing layer after the primary and secondary streams have merged. Significant radial static pressure variations occur in both the initial mixing and transition regions as a result of turbulent normal stress gradients and streamline curvature effects induced by potential core entrainment.
    keyword(s): Measurement , Pressure gradient , Stress , Shear (Mechanics) , Turbulence , Pressure , Air jets AND Gradients ,
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      Measurements of Confined, Coaxial Jet Mixing With Pressure Gradient

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/101337
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    contributor authorD. W. Choi
    contributor authorF. B. Gessner
    contributor authorG. C. Oates
    date accessioned2017-05-08T23:22:50Z
    date available2017-05-08T23:22:50Z
    date copyrightMarch, 1986
    date issued1986
    identifier issn0098-2202
    identifier otherJFEGA4-27018#39_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/101337
    description abstractThe mixing of a subsonic confined air jet with a coaxial secondary air stream is investigated experimentally. This work differs from previous studies in that emphasis is placed on the effects of an imposed adverse pressure gradient on mixing characteristics in the initial mixing (potential core) and transition regions. The results indicate that the presence of an adverse pressure gradient promotes more rapid mixing and spreading of the shear layer in the initial mixing region, as well as elevated turbulent normal stress and shear stress levels in the outer portion of the mixing layer after the primary and secondary streams have merged. Significant radial static pressure variations occur in both the initial mixing and transition regions as a result of turbulent normal stress gradients and streamline curvature effects induced by potential core entrainment.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleMeasurements of Confined, Coaxial Jet Mixing With Pressure Gradient
    typeJournal Paper
    journal volume108
    journal issue1
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.3242541
    journal fristpage39
    journal lastpage46
    identifier eissn1528-901X
    keywordsMeasurement
    keywordsPressure gradient
    keywordsStress
    keywordsShear (Mechanics)
    keywordsTurbulence
    keywordsPressure
    keywordsAir jets AND Gradients
    treeJournal of Fluids Engineering:;1986:;volume( 108 ):;issue: 001
    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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