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    Computational and Experimental Study of Film-Cooling Effectiveness With and Without Downstream Vortex Generators

    Source: Journal of Turbomachinery:;2022:;volume( 145 ):;issue: 002::page 21007-1
    Author:
    Lee, Chien-Shing
    ,
    Shih, Tom I-P.
    ,
    Straub, Douglas
    ,
    Weber, Justin M.
    ,
    Robey, Edward H.
    DOI: 10.1115/1.4055529
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Downstream vortex generators that involve a pair of rectangular plates arranged in an open V-shape placed just downstream of each film-cooling hole were shown to create flow and vortical structures that entrain lifted film-cooling flow back to the surface and increase its lateral spreading on the surface (GT2020–14317). In this study, computations and measurements were performed to examine the flow mechanisms this vortex generator induces to improve film-cooling effectiveness of a flat plate with the cooling flow emanating from one row of inclined holes. Parameters studied include blowing ratio (BR = 0.75 and 1.0) and temperature ratio (TR = 1.07 and 1.9). The computational study is based on steady Reynolds-averaged Navier–Stokes (RANS) closed by the shear-stress transport (SST) turbulence model with and without conjugate analysis. The experimental study was conducted by using a conjugate heat transfer test rig with a plenum, where cooling flow is introduced. Measurements made include velocity and temperature profiles upstream and downstream of the film-cooling holes as well as the temperature at several locations on the hot and cold sides of the film-cooled flat plate. The computational study was validated by comparing computed results with those from measurements at BR = 0.75 and 1.0 and TR = 1.9. Computational and experimental results are presented to show the effects of BR and TR on the flow structures and how those structures improve the effectiveness of film cooling with and without the downstream vortex generators and with and without conjugate heat transfer.
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      Computational and Experimental Study of Film-Cooling Effectiveness With and Without Downstream Vortex Generators

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    contributor authorLee, Chien-Shing
    contributor authorShih, Tom I-P.
    contributor authorStraub, Douglas
    contributor authorWeber, Justin M.
    contributor authorRobey, Edward H.
    date accessioned2023-08-16T18:08:48Z
    date available2023-08-16T18:08:48Z
    date copyright10/12/2022 12:00:00 AM
    date issued2022
    identifier issn0889-504X
    identifier otherturbo_145_2_021007.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4291501
    description abstractDownstream vortex generators that involve a pair of rectangular plates arranged in an open V-shape placed just downstream of each film-cooling hole were shown to create flow and vortical structures that entrain lifted film-cooling flow back to the surface and increase its lateral spreading on the surface (GT2020–14317). In this study, computations and measurements were performed to examine the flow mechanisms this vortex generator induces to improve film-cooling effectiveness of a flat plate with the cooling flow emanating from one row of inclined holes. Parameters studied include blowing ratio (BR = 0.75 and 1.0) and temperature ratio (TR = 1.07 and 1.9). The computational study is based on steady Reynolds-averaged Navier–Stokes (RANS) closed by the shear-stress transport (SST) turbulence model with and without conjugate analysis. The experimental study was conducted by using a conjugate heat transfer test rig with a plenum, where cooling flow is introduced. Measurements made include velocity and temperature profiles upstream and downstream of the film-cooling holes as well as the temperature at several locations on the hot and cold sides of the film-cooled flat plate. The computational study was validated by comparing computed results with those from measurements at BR = 0.75 and 1.0 and TR = 1.9. Computational and experimental results are presented to show the effects of BR and TR on the flow structures and how those structures improve the effectiveness of film cooling with and without the downstream vortex generators and with and without conjugate heat transfer.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleComputational and Experimental Study of Film-Cooling Effectiveness With and Without Downstream Vortex Generators
    typeJournal Paper
    journal volume145
    journal issue2
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.4055529
    journal fristpage21007-1
    journal lastpage21007-15
    page15
    treeJournal of Turbomachinery:;2022:;volume( 145 ):;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
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