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    Numerical and Experimental Study on the Heat Flux of Double-Wave Trench

    Source: Journal of Thermal Science and Engineering Applications:;2020:;volume( 012 ):;issue: 004::page 041002-1
    Author:
    Zhang, Bo-lun
    ,
    Zhu, Hui-ren
    ,
    Liu, Cun-liang
    ,
    Wei, Jian-sheng
    DOI: 10.1115/1.4045220
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The film cooling characteristics of the transverse trench (TT) and the double-wave trench (DWT) were numerically studied by using Reynolds-averaged Navier–Stokes simulations with realizable k–ɛ turbulence model and enhanced wall treatment. The experiment was used to validate the accuracy of numerical simulation. The film cooling effectiveness and the heat transfer coefficient and the heat flux ratio of the double-wave trench are investigated, and the distribution of temperature field and flow field were analyzed. The results show that the double-wave trench can effectively improve the uniformity of jet compared with the transverse trench. The anti-counter-rotating vortices which can press the film on near-wall are formed at the downstream wall of the double-wave trench. With the increase of the blowing ratio, the span-wise averaged heat transfer coefficient of the double-wave trench increases. The span-wise average heat flux ratio of the trench width W = 1.4D condition is lower than that of the other two trenches, so it has the best thermal protection effect of film cooling on the wall.
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      Numerical and Experimental Study on the Heat Flux of Double-Wave Trench

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4275611
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    • Journal of Thermal Science and Engineering Applications

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    contributor authorZhang, Bo-lun
    contributor authorZhu, Hui-ren
    contributor authorLiu, Cun-liang
    contributor authorWei, Jian-sheng
    date accessioned2022-02-04T22:52:34Z
    date available2022-02-04T22:52:34Z
    date copyright8/1/2020 12:00:00 AM
    date issued2020
    identifier issn1948-5085
    identifier othertsea_12_4_041002.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4275611
    description abstractThe film cooling characteristics of the transverse trench (TT) and the double-wave trench (DWT) were numerically studied by using Reynolds-averaged Navier–Stokes simulations with realizable k–ɛ turbulence model and enhanced wall treatment. The experiment was used to validate the accuracy of numerical simulation. The film cooling effectiveness and the heat transfer coefficient and the heat flux ratio of the double-wave trench are investigated, and the distribution of temperature field and flow field were analyzed. The results show that the double-wave trench can effectively improve the uniformity of jet compared with the transverse trench. The anti-counter-rotating vortices which can press the film on near-wall are formed at the downstream wall of the double-wave trench. With the increase of the blowing ratio, the span-wise averaged heat transfer coefficient of the double-wave trench increases. The span-wise average heat flux ratio of the trench width W = 1.4D condition is lower than that of the other two trenches, so it has the best thermal protection effect of film cooling on the wall.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleNumerical and Experimental Study on the Heat Flux of Double-Wave Trench
    typeJournal Paper
    journal volume12
    journal issue4
    journal titleJournal of Thermal Science and Engineering Applications
    identifier doi10.1115/1.4045220
    journal fristpage041002-1
    journal lastpage041002-15
    page15
    treeJournal of Thermal Science and Engineering Applications:;2020:;volume( 012 ):;issue: 004
    contenttypeFulltext
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