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    Film Effectiveness Performance of an Arrowhead-Shaped Film-Cooling Hole Geometry

    Source: Journal of Turbomachinery:;2007:;volume( 129 ):;issue: 002::page 331
    Author:
    Yoji Okita
    ,
    Masakazu Nishiura
    DOI: 10.1115/1.2437781
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: This paper presents the first experimental and numerical work of film effectiveness performance for a novel film-cooling method with an arrowhead-shaped hole geometry. Experimental results demonstrate that the proposed hole geometry improves the film effectiveness on both suction and pressure surface of a generic turbine airfoil. Film effectiveness data for a row of the holes are compared to that of fan-shaped holes at the same inclination angle of 35 deg to the surface on a large-scale airfoil model at engine representative Reynolds number and Mach number in a high-speed tunnel with moderately elevated temperature mainstream flow. The film effectiveness data are collected using pressure-sensitive paint. Numerical results show that the coolant film with the proposed hole geometry remains well attached to the surface and diffuses in the lateral direction in comparison with the conventional laidback fan-shaped holes for coolant to mainstream blowing ratios of 0.6–3.5.
    keyword(s): Pressure , Flow (Dynamics) , Cooling , Coolants , Geometry , Airfoils AND Suction ,
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      Film Effectiveness Performance of an Arrowhead-Shaped Film-Cooling Hole Geometry

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/137041
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    contributor authorYoji Okita
    contributor authorMasakazu Nishiura
    date accessioned2017-05-09T00:26:11Z
    date available2017-05-09T00:26:11Z
    date copyrightApril, 2007
    date issued2007
    identifier issn0889-504X
    identifier otherJOTUEI-28736#331_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/137041
    description abstractThis paper presents the first experimental and numerical work of film effectiveness performance for a novel film-cooling method with an arrowhead-shaped hole geometry. Experimental results demonstrate that the proposed hole geometry improves the film effectiveness on both suction and pressure surface of a generic turbine airfoil. Film effectiveness data for a row of the holes are compared to that of fan-shaped holes at the same inclination angle of 35 deg to the surface on a large-scale airfoil model at engine representative Reynolds number and Mach number in a high-speed tunnel with moderately elevated temperature mainstream flow. The film effectiveness data are collected using pressure-sensitive paint. Numerical results show that the coolant film with the proposed hole geometry remains well attached to the surface and diffuses in the lateral direction in comparison with the conventional laidback fan-shaped holes for coolant to mainstream blowing ratios of 0.6–3.5.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleFilm Effectiveness Performance of an Arrowhead-Shaped Film-Cooling Hole Geometry
    typeJournal Paper
    journal volume129
    journal issue2
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.2437781
    journal fristpage331
    journal lastpage339
    identifier eissn1528-8900
    keywordsPressure
    keywordsFlow (Dynamics)
    keywordsCooling
    keywordsCoolants
    keywordsGeometry
    keywordsAirfoils AND Suction
    treeJournal of Turbomachinery:;2007:;volume( 129 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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