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    Decay of Turbulence in Axisymmetric Wakes

    Source: Journal of Fluids Engineering:;1966:;volume( 088 ):;issue: 001::page 261
    Author:
    N. H. C. Hwang
    ,
    L. V. Baldwin
    DOI: 10.1115/1.3645824
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Turbulent wakes formed downstream of flat, circular disks were surveyed with hot-wire anemometers in a low-speed wind tunnel. Three regions were discernible in the wake. Between the disk and x = 50 disk diameters D downstream, the turbulence was highly anisotropic and new turbulence was generated locally. An approximate similarity region (100 ≲ x/D ≲ 400) existed where isotropic turbulence relations were adequate for estimating decay. The far downstream wake (x/D ≳ 400) was highly intermittent throughout; the decay rate lessened in this final period. Over a 4-fold range of disk size and a 7 1/2 -fold range of mean flow velocity, Taylor’s microscale was correlated by the mean residence time x/U∞ ; this relation was independent of disk size.
    keyword(s): Turbulence , Wakes , Disks , Wind tunnels , Flow (Dynamics) , Wake turbulence , Microscale devices AND Wire ,
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      Decay of Turbulence in Axisymmetric Wakes

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    https://yetl.yabesh.ir/yetl1/handle/yetl/114301
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    contributor authorN. H. C. Hwang
    contributor authorL. V. Baldwin
    date accessioned2017-05-08T23:45:27Z
    date available2017-05-08T23:45:27Z
    date copyrightMarch, 1966
    date issued1966
    identifier issn0098-2202
    identifier otherJFEGA4-27271#261_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/114301
    description abstractTurbulent wakes formed downstream of flat, circular disks were surveyed with hot-wire anemometers in a low-speed wind tunnel. Three regions were discernible in the wake. Between the disk and x = 50 disk diameters D downstream, the turbulence was highly anisotropic and new turbulence was generated locally. An approximate similarity region (100 ≲ x/D ≲ 400) existed where isotropic turbulence relations were adequate for estimating decay. The far downstream wake (x/D ≳ 400) was highly intermittent throughout; the decay rate lessened in this final period. Over a 4-fold range of disk size and a 7 1/2 -fold range of mean flow velocity, Taylor’s microscale was correlated by the mean residence time x/U∞ ; this relation was independent of disk size.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDecay of Turbulence in Axisymmetric Wakes
    typeJournal Paper
    journal volume88
    journal issue1
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.3645824
    journal fristpage261
    journal lastpage267
    identifier eissn1528-901X
    keywordsTurbulence
    keywordsWakes
    keywordsDisks
    keywordsWind tunnels
    keywordsFlow (Dynamics)
    keywordsWake turbulence
    keywordsMicroscale devices AND Wire
    treeJournal of Fluids Engineering:;1966:;volume( 088 ):;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
    yabeshDSpacePersian