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    High Frequency Surface Heat Flux Imaging of Bypass Transition

    Source: Journal of Turbomachinery:;2005:;volume( 127 ):;issue: 002::page 241
    Author:
    Richard J. Anthony
    ,
    Terry V. Jones
    ,
    John E. LaGraff
    DOI: 10.1115/1.1860379
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A high-frequency surface heat flux imaging technique was used to investigate bypass transition induced by freestream turbulence. Fundamental experiments were carried out at the University of Oxford using high-density thin film arrays on a flat plate wind tunnel model. Bypass transition was induced by grid-generated turbulence with varying intensities of 2.3%, 4.2%, and 17% with a fixed integral length scale of approximately 12mm. Unique high resolution temporal heat flux images are shown which detail significant differences between unsteady surface heat flux events induced by freestream turbulence and the classical Emmons-type spots which many turbomachinery transition models are based on. The temporal imaging technique presented allows study of unsteady surface heat transfer in detail, and helps elucidate the complex nature of transition in the high-disturbance environment of turbomachinery.
    keyword(s): Turbulence , Heat flux , Boundary layers , Imaging AND Heat transfer ,
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      High Frequency Surface Heat Flux Imaging of Bypass Transition

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/132806
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    • Journal of Turbomachinery

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    contributor authorRichard J. Anthony
    contributor authorTerry V. Jones
    contributor authorJohn E. LaGraff
    date accessioned2017-05-09T00:18:10Z
    date available2017-05-09T00:18:10Z
    date copyrightApril, 2005
    date issued2005
    identifier issn0889-504X
    identifier otherJOTUEI-28719#241_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/132806
    description abstractA high-frequency surface heat flux imaging technique was used to investigate bypass transition induced by freestream turbulence. Fundamental experiments were carried out at the University of Oxford using high-density thin film arrays on a flat plate wind tunnel model. Bypass transition was induced by grid-generated turbulence with varying intensities of 2.3%, 4.2%, and 17% with a fixed integral length scale of approximately 12mm. Unique high resolution temporal heat flux images are shown which detail significant differences between unsteady surface heat flux events induced by freestream turbulence and the classical Emmons-type spots which many turbomachinery transition models are based on. The temporal imaging technique presented allows study of unsteady surface heat transfer in detail, and helps elucidate the complex nature of transition in the high-disturbance environment of turbomachinery.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleHigh Frequency Surface Heat Flux Imaging of Bypass Transition
    typeJournal Paper
    journal volume127
    journal issue2
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.1860379
    journal fristpage241
    journal lastpage250
    identifier eissn1528-8900
    keywordsTurbulence
    keywordsHeat flux
    keywordsBoundary layers
    keywordsImaging AND Heat transfer
    treeJournal of Turbomachinery:;2005:;volume( 127 ):;issue: 002
    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