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    Numerical Investigation of Film Cooling Enhancement Using Staggered Row Mixed Hole Arrangements

    Source: Journal of Thermal Science and Engineering Applications:;2017:;volume( 009 ):;issue: 002::page 21007
    Author:
    Jindal, Prakhar
    ,
    Agarwal, Shubham
    ,
    Sharma, R. P.
    ,
    Roy, A. K.
    DOI: 10.1115/1.4035448
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The paper presents a novel study on film cooling effectiveness of a 3D flat plate with a multihole arrangement of mixed hole shapes. The film cooling arrangement consists of two rows of coolant holes, organized in a staggered pattern with an L/D (length to diameter ratio) of 10. The two rows consist of varied combinations of triangular and semi-elliptic shaped holes for the enhancement of film-cooling effectiveness. The results were obtained for a coolant to mainstream temperature ratio of 0.5 and a blowing ratio of 1.0. The computed flow temperature fields are presented in addition to the local two-dimensional streamwise and spanwise distribution of film cooling effectiveness. Validation of the results obtained from the turbulence model has been done with the experimental data of centerline film cooling effectiveness downstream of the cooling holes available in the open literature. The results showed the rapid merging of coolant jets emerging from front row of multiholes with the secondary staggered row of mixed holes. Due to the mainstream–coolant jet interaction, the strength of the counter rotating vortex pair was mitigated in the downstream region for certain arrangement of mixed hole shapes. The optimal hole combination with maximum overall effectiveness has been deduced from this study. The best configuration (M.R. VI) not only favored for the developed film, but also enhanced the averaged film cooling effectiveness to a large extent.
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      Numerical Investigation of Film Cooling Enhancement Using Staggered Row Mixed Hole Arrangements

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    contributor authorJindal, Prakhar
    contributor authorAgarwal, Shubham
    contributor authorSharma, R. P.
    contributor authorRoy, A. K.
    date accessioned2017-11-25T07:19:24Z
    date available2017-11-25T07:19:24Z
    date copyright2017/7/2
    date issued2017
    identifier issn1948-5085
    identifier othertsea_009_02_021007.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4235798
    description abstractThe paper presents a novel study on film cooling effectiveness of a 3D flat plate with a multihole arrangement of mixed hole shapes. The film cooling arrangement consists of two rows of coolant holes, organized in a staggered pattern with an L/D (length to diameter ratio) of 10. The two rows consist of varied combinations of triangular and semi-elliptic shaped holes for the enhancement of film-cooling effectiveness. The results were obtained for a coolant to mainstream temperature ratio of 0.5 and a blowing ratio of 1.0. The computed flow temperature fields are presented in addition to the local two-dimensional streamwise and spanwise distribution of film cooling effectiveness. Validation of the results obtained from the turbulence model has been done with the experimental data of centerline film cooling effectiveness downstream of the cooling holes available in the open literature. The results showed the rapid merging of coolant jets emerging from front row of multiholes with the secondary staggered row of mixed holes. Due to the mainstream–coolant jet interaction, the strength of the counter rotating vortex pair was mitigated in the downstream region for certain arrangement of mixed hole shapes. The optimal hole combination with maximum overall effectiveness has been deduced from this study. The best configuration (M.R. VI) not only favored for the developed film, but also enhanced the averaged film cooling effectiveness to a large extent.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNumerical Investigation of Film Cooling Enhancement Using Staggered Row Mixed Hole Arrangements
    typeJournal Paper
    journal volume9
    journal issue2
    journal titleJournal of Thermal Science and Engineering Applications
    identifier doi10.1115/1.4035448
    journal fristpage21007
    journal lastpage021007-9
    treeJournal of Thermal Science and Engineering Applications:;2017:;volume( 009 ):;issue: 002
    contenttypeFulltext
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