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    Influence of Different Rim Widths and Blowing Ratios on Film Cooling Characteristics for a Blade Tip

    Source: Journal of Heat Transfer:;2012:;volume( 134 ):;issue: 006::page 61701
    Author:
    Jin Wang
    ,
    Bengt Sundén
    ,
    Min Zeng
    ,
    Qiu-wang Wang
    DOI: 10.1115/1.4006017
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Three-dimensional simulations of the squealer tip on the GE-E3 blade with eight film cooling holes were carried out. The effect of the rim width and the blowing ratio on the blade tip flow and cooling performance were revealed. Numerical simulations were performed to predict the leakage flow and the tip heat transfer with the k–ɛ model. For the squealer tip, the depth of the cavity is fixed but the rim width varies to form a wide cavity, which can decrease the coolant momentum and the tip leakage flow velocity. This cavity contributes to the improvement of the cooling effect in the tip zone. To investigate the influence on the tip heat transfer by the rim width, numerical simulations were performed as a two-part study: (1) unequal rim width study on the pressure side and the suction side and (2) equal rim width study with rim widths of 0.58%, 1.16%, and 1.74% of the axial chord (0.5 mm, 1 mm, and 1.5 mm, respectively) on both the pressure side rim and the suction side rim. With different rim widths, the effect of different global blowing ratios, i.e., M = 0.5, 1.0 and 1.5, was investigated. It is found that the total heat transfer rate is increasing and the heat transfer rates on the rim surface (RS) rapidly ascend with increasing rim width.
    keyword(s): Pressure , Flow (Dynamics) , Heat transfer , Cooling , Blades , Suction , Coolants , Computer simulation AND Cavities ,
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      Influence of Different Rim Widths and Blowing Ratios on Film Cooling Characteristics for a Blade Tip

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    http://yetl.yabesh.ir/yetl1/handle/yetl/149436
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    contributor authorJin Wang
    contributor authorBengt Sundén
    contributor authorMin Zeng
    contributor authorQiu-wang Wang
    date accessioned2017-05-09T00:52:10Z
    date available2017-05-09T00:52:10Z
    date copyrightJune, 2012
    date issued2012
    identifier issn0022-1481
    identifier otherJHTRAO-27943#061701_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/149436
    description abstractThree-dimensional simulations of the squealer tip on the GE-E3 blade with eight film cooling holes were carried out. The effect of the rim width and the blowing ratio on the blade tip flow and cooling performance were revealed. Numerical simulations were performed to predict the leakage flow and the tip heat transfer with the k–ɛ model. For the squealer tip, the depth of the cavity is fixed but the rim width varies to form a wide cavity, which can decrease the coolant momentum and the tip leakage flow velocity. This cavity contributes to the improvement of the cooling effect in the tip zone. To investigate the influence on the tip heat transfer by the rim width, numerical simulations were performed as a two-part study: (1) unequal rim width study on the pressure side and the suction side and (2) equal rim width study with rim widths of 0.58%, 1.16%, and 1.74% of the axial chord (0.5 mm, 1 mm, and 1.5 mm, respectively) on both the pressure side rim and the suction side rim. With different rim widths, the effect of different global blowing ratios, i.e., M = 0.5, 1.0 and 1.5, was investigated. It is found that the total heat transfer rate is increasing and the heat transfer rates on the rim surface (RS) rapidly ascend with increasing rim width.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleInfluence of Different Rim Widths and Blowing Ratios on Film Cooling Characteristics for a Blade Tip
    typeJournal Paper
    journal volume134
    journal issue6
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4006017
    journal fristpage61701
    identifier eissn1528-8943
    keywordsPressure
    keywordsFlow (Dynamics)
    keywordsHeat transfer
    keywordsCooling
    keywordsBlades
    keywordsSuction
    keywordsCoolants
    keywordsComputer simulation AND Cavities
    treeJournal of Heat Transfer:;2012:;volume( 134 ):;issue: 006
    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