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    Enhanced Impingement Heat Transfer: The Influence of Impingement X/D for Interrupted Rib Obstacles (Rectangular Pin Fins)

    Source: Journal of Turbomachinery:;2006:;volume( 128 ):;issue: 002::page 321
    Author:
    G. E. Andrews
    ,
    R. A. A. Abdul Hussain
    ,
    M. C. Mkpadi
    DOI: 10.1115/1.1860574
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Impingement flat wall cooling, with 15.2 mm pitch square hole arrays, was investigated in the presence of an array of interrupted rib obstacles. These ribs took the form of rectangular pin-fins with a 50% blockage to the cross flow. One side exit of the air was used, and there was no initial cross flow. Three hole diameters were investigated, which allowed the impingement wall pressure loss to be varied at constant coolant mass flow rate. Combustor wall cooling was the main application of the work, where a low wall cooling pressure loss is required if the air is subsequently to be fed to a low NOx combustor. The results showed that the increase in surface average impingement heat transfer, relative to that for a smooth wall, was small and greatest for an X∕D of 3.06 at 15%. The main effect of the interrupted ribs was to change the influence of cross flow, which produced a deterioration in the heat transfer with distance compared to a smooth impingement wall. With the interrupted ribs the heat transfer increased with distance. If the heat transfer was compared at the trailing edge of the test section, where the upstream cross flow was at a maximum, then at high coolant flow rates the increase in heat transfer was 21%, 47%, and 25% for X∕D of 4.66, 3.06, and 1.86, respectively.
    keyword(s): Pressure , Flow (Dynamics) , Heat transfer , Fins , Cross-flow , Jets AND Coolants ,
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      Enhanced Impingement Heat Transfer: The Influence of Impingement X/D for Interrupted Rib Obstacles (Rectangular Pin Fins)

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    http://yetl.yabesh.ir/yetl1/handle/yetl/134850
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    contributor authorG. E. Andrews
    contributor authorR. A. A. Abdul Hussain
    contributor authorM. C. Mkpadi
    date accessioned2017-05-09T00:21:59Z
    date available2017-05-09T00:21:59Z
    date copyrightApril, 2006
    date issued2006
    identifier issn0889-504X
    identifier otherJOTUEI-28728#321_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/134850
    description abstractImpingement flat wall cooling, with 15.2 mm pitch square hole arrays, was investigated in the presence of an array of interrupted rib obstacles. These ribs took the form of rectangular pin-fins with a 50% blockage to the cross flow. One side exit of the air was used, and there was no initial cross flow. Three hole diameters were investigated, which allowed the impingement wall pressure loss to be varied at constant coolant mass flow rate. Combustor wall cooling was the main application of the work, where a low wall cooling pressure loss is required if the air is subsequently to be fed to a low NOx combustor. The results showed that the increase in surface average impingement heat transfer, relative to that for a smooth wall, was small and greatest for an X∕D of 3.06 at 15%. The main effect of the interrupted ribs was to change the influence of cross flow, which produced a deterioration in the heat transfer with distance compared to a smooth impingement wall. With the interrupted ribs the heat transfer increased with distance. If the heat transfer was compared at the trailing edge of the test section, where the upstream cross flow was at a maximum, then at high coolant flow rates the increase in heat transfer was 21%, 47%, and 25% for X∕D of 4.66, 3.06, and 1.86, respectively.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleEnhanced Impingement Heat Transfer: The Influence of Impingement X/D for Interrupted Rib Obstacles (Rectangular Pin Fins)
    typeJournal Paper
    journal volume128
    journal issue2
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.1860574
    journal fristpage321
    journal lastpage331
    identifier eissn1528-8900
    keywordsPressure
    keywordsFlow (Dynamics)
    keywordsHeat transfer
    keywordsFins
    keywordsCross-flow
    keywordsJets AND Coolants
    treeJournal of Turbomachinery:;2006:;volume( 128 ):;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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