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    Local Heat Transfer Dependency on Thermal Boundary Condition in Ribbed Cooling Channel Geometries

    Source: Journal of Heat Transfer:;2013:;volume( 135 ):;issue: 010::page 101001
    Author:
    Cukurel, Beni
    ,
    Arts, Tony
    DOI: 10.1115/1.4024494
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The present study is geared toward quantifying the effects of imposed thermal boundary condition in cooling channel applications. In this regard, tests are conducted in a generic passage, with evenly distributed rib type perturbators at 90 deg, with a 30% passage blockage ratio and pitchtoheight ratio of 10. Uniform heatflux is imposed on the external side of the slab which provides Biot number and solidtofluid thermal conductivity ratio around 1 and 600, respectively. Through infrared thermometry measurements over the wetted surface and via an energy balance within the solid, conjugate heat transfer coefficients are calculated over a single ribpitch. The local heat extraction is demonstrated to be a strong function of the conduction effects, observed more dominantly in the rib vicinity. Moreover, the aerothermal effects are investigated by comparing the findings with analogous aerodynamic literature, enabling heat transfer distributions to be associated with distinct flow structures. Furthermore, the results are contrasted with the isoheatflux wetted boundary condition test case. Neglecting the thermal boundary condition dependence, and thus the true thermal history of the boundary layer, is demonstrated to produce large errors in heat transfer predictions.
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      Local Heat Transfer Dependency on Thermal Boundary Condition in Ribbed Cooling Channel Geometries

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    http://yetl.yabesh.ir/yetl1/handle/yetl/152230
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    contributor authorCukurel, Beni
    contributor authorArts, Tony
    date accessioned2017-05-09T01:00:02Z
    date available2017-05-09T01:00:02Z
    date issued2013
    identifier issn0022-1481
    identifier otherht_135_10_101001.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/152230
    description abstractThe present study is geared toward quantifying the effects of imposed thermal boundary condition in cooling channel applications. In this regard, tests are conducted in a generic passage, with evenly distributed rib type perturbators at 90 deg, with a 30% passage blockage ratio and pitchtoheight ratio of 10. Uniform heatflux is imposed on the external side of the slab which provides Biot number and solidtofluid thermal conductivity ratio around 1 and 600, respectively. Through infrared thermometry measurements over the wetted surface and via an energy balance within the solid, conjugate heat transfer coefficients are calculated over a single ribpitch. The local heat extraction is demonstrated to be a strong function of the conduction effects, observed more dominantly in the rib vicinity. Moreover, the aerothermal effects are investigated by comparing the findings with analogous aerodynamic literature, enabling heat transfer distributions to be associated with distinct flow structures. Furthermore, the results are contrasted with the isoheatflux wetted boundary condition test case. Neglecting the thermal boundary condition dependence, and thus the true thermal history of the boundary layer, is demonstrated to produce large errors in heat transfer predictions.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleLocal Heat Transfer Dependency on Thermal Boundary Condition in Ribbed Cooling Channel Geometries
    typeJournal Paper
    journal volume135
    journal issue10
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4024494
    journal fristpage101001
    journal lastpage101001
    identifier eissn1528-8943
    treeJournal of Heat Transfer:;2013:;volume( 135 ):;issue: 010
    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
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