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    Heat Transfer of a Rotating Rectangular Channel With a Diamond Shaped Pin Fin Array at High Rotation Numbers

    Source: Journal of Turbomachinery:;2013:;volume( 135 ):;issue: 004::page 41007
    Author:
    Chang, S. W.
    ,
    Liou, T.
    ,
    Lee, T.
    DOI: 10.1115/1.4007684
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This experimental study measured the detailed Nusselt numbers (Nu) distributions over two opposite leading and trailing walls of a rotating rectangular channel fitted with a diamondshaped pinfin array with radially outward flow for gas turbine rotor blade cooling applications. The combined and isolated effects of Reynolds (Re), rotation (Ro), and buoyancy (Bu) numbers on local and areaaveraged Nusselt numbers (Nu and Nuآ¯) were examined at the test conditions of 5000 ≤ Re ≤ 15,000, 0 ≤ Ro ≤ 0.6, and 0.0007 ≤ Bu ≤ 0.31. The present infrared thermography method enables the generation of fullfield Nu scans over the rotating end walls at the realistic engine Ro conditions as the first attempt to reveal the combined rotating buoyancy and Coriolis force effects on heat transfer properties. The selected heat transfer results demonstrate the Coriolis and rotatingbuoyancy effects on the heat transfer performances of this rotating channel. Acting by the combined Coriolis and rotating buoyancy effects on the areaaveraged heat transfer properties, the rotating leading and trailing areaaveraged Nusselt numbers are modified, respectively, to 0.82–1.52 and 1–1.89 times the static channel references. A set of physically consistent empirical Nuآ¯ correlations was generated to permit the assessments of individual and interdependent Re, Ro, and Bu effects on the areaaveraged heat transfer properties over leading and trailing end walls.
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      Heat Transfer of a Rotating Rectangular Channel With a Diamond Shaped Pin Fin Array at High Rotation Numbers

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    contributor authorChang, S. W.
    contributor authorLiou, T.
    contributor authorLee, T.
    date accessioned2017-05-09T01:03:40Z
    date available2017-05-09T01:03:40Z
    date issued2013
    identifier issn0889-504X
    identifier otherturb_135_4_041007.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/153461
    description abstractThis experimental study measured the detailed Nusselt numbers (Nu) distributions over two opposite leading and trailing walls of a rotating rectangular channel fitted with a diamondshaped pinfin array with radially outward flow for gas turbine rotor blade cooling applications. The combined and isolated effects of Reynolds (Re), rotation (Ro), and buoyancy (Bu) numbers on local and areaaveraged Nusselt numbers (Nu and Nuآ¯) were examined at the test conditions of 5000 ≤ Re ≤ 15,000, 0 ≤ Ro ≤ 0.6, and 0.0007 ≤ Bu ≤ 0.31. The present infrared thermography method enables the generation of fullfield Nu scans over the rotating end walls at the realistic engine Ro conditions as the first attempt to reveal the combined rotating buoyancy and Coriolis force effects on heat transfer properties. The selected heat transfer results demonstrate the Coriolis and rotatingbuoyancy effects on the heat transfer performances of this rotating channel. Acting by the combined Coriolis and rotating buoyancy effects on the areaaveraged heat transfer properties, the rotating leading and trailing areaaveraged Nusselt numbers are modified, respectively, to 0.82–1.52 and 1–1.89 times the static channel references. A set of physically consistent empirical Nuآ¯ correlations was generated to permit the assessments of individual and interdependent Re, Ro, and Bu effects on the areaaveraged heat transfer properties over leading and trailing end walls.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleHeat Transfer of a Rotating Rectangular Channel With a Diamond Shaped Pin Fin Array at High Rotation Numbers
    typeJournal Paper
    journal volume135
    journal issue4
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.4007684
    journal fristpage41007
    journal lastpage41007
    identifier eissn1528-8900
    treeJournal of Turbomachinery:;2013:;volume( 135 ):;issue: 004
    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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