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    Double Wall Cooling of a Full Coverage Effusion Plate With Cross Flow Supply Cooling and Main Flow Pressure Gradient

    Source: Journal of Engineering for Gas Turbines and Power:;2019:;volume( 141 ):;issue: 003::page 31015
    Author:
    Ligrani, Phil
    ,
    Ren, Zhong
    ,
    Vanga, Sneha Reddy
    ,
    Allgaier, Christopher
    ,
    Liberatore, Federico
    ,
    Patel, Rajeshriben
    ,
    Srinivasan, Ram
    ,
    Ho, Yin-Hsiang
    DOI: 10.1115/1.4041451
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Experimentally measured results are presented for different experimental conditions for a test plate with double wall cooling, composed of full-coverage effusion-cooling on the hot side of the plate, and cross-flow cooling on the cold side of the plate. The results presented are different from those from past investigations, because of the addition of a significant mainstream pressure gradient. Main stream flow is provided along a passage with a contraction ratio of 4, given by the ratio upstream flow area, to downstream flow area. With this arrangement, local blowing ratio decreases significantly with streamwise development along the test section, for every value of initial blowing ratio considered, where this initial value is determined at the most upstream row of effusion holes. Experimental data are given for a sparse effusion hole array. The experimental results are provided for mainstream Reynolds numbers of 92,400–96,600, and from 128,400 to 135,000, and initial blowing ratios of 3.3–3.6, 4.4, 5.2, 6.1–6.3, and 7.3–7.4. Results illustrate the effects of blowing ratio for the hot side and the cold side of the effusion plate. Of particular interest are values of line-averaged film cooling effectiveness and line-averaged heat transfer coefficient, which are generally different for contraction ratio of 4, compared to a contraction ratio of 1, because of different amounts and concentrations of effusion coolant near the test surface. In regard to cold-side measurements on the crossflow side of the effusion plate, line-averaged Nusselt numbers for contraction ratio 4 are often less than values for contraction ratio 1, when compared at the same main flow Reynolds number, initial blowing ratio, and streamwise location.
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      Double Wall Cooling of a Full Coverage Effusion Plate With Cross Flow Supply Cooling and Main Flow Pressure Gradient

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4256041
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    contributor authorLigrani, Phil
    contributor authorRen, Zhong
    contributor authorVanga, Sneha Reddy
    contributor authorAllgaier, Christopher
    contributor authorLiberatore, Federico
    contributor authorPatel, Rajeshriben
    contributor authorSrinivasan, Ram
    contributor authorHo, Yin-Hsiang
    date accessioned2019-03-17T10:16:38Z
    date available2019-03-17T10:16:38Z
    date copyright10/4/2018 12:00:00 AM
    date issued2019
    identifier issn0742-4795
    identifier othergtp_141_03_031015.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4256041
    description abstractExperimentally measured results are presented for different experimental conditions for a test plate with double wall cooling, composed of full-coverage effusion-cooling on the hot side of the plate, and cross-flow cooling on the cold side of the plate. The results presented are different from those from past investigations, because of the addition of a significant mainstream pressure gradient. Main stream flow is provided along a passage with a contraction ratio of 4, given by the ratio upstream flow area, to downstream flow area. With this arrangement, local blowing ratio decreases significantly with streamwise development along the test section, for every value of initial blowing ratio considered, where this initial value is determined at the most upstream row of effusion holes. Experimental data are given for a sparse effusion hole array. The experimental results are provided for mainstream Reynolds numbers of 92,400–96,600, and from 128,400 to 135,000, and initial blowing ratios of 3.3–3.6, 4.4, 5.2, 6.1–6.3, and 7.3–7.4. Results illustrate the effects of blowing ratio for the hot side and the cold side of the effusion plate. Of particular interest are values of line-averaged film cooling effectiveness and line-averaged heat transfer coefficient, which are generally different for contraction ratio of 4, compared to a contraction ratio of 1, because of different amounts and concentrations of effusion coolant near the test surface. In regard to cold-side measurements on the crossflow side of the effusion plate, line-averaged Nusselt numbers for contraction ratio 4 are often less than values for contraction ratio 1, when compared at the same main flow Reynolds number, initial blowing ratio, and streamwise location.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDouble Wall Cooling of a Full Coverage Effusion Plate With Cross Flow Supply Cooling and Main Flow Pressure Gradient
    typeJournal Paper
    journal volume141
    journal issue3
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.4041451
    journal fristpage31015
    journal lastpage031015-11
    treeJournal of Engineering for Gas Turbines and Power:;2019:;volume( 141 ):;issue: 003
    contenttypeFulltext
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