YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • ASME
    • Journal of Turbomachinery
    • View Item
    •   YE&T Library
    • ASME
    • Journal of Turbomachinery
    • View Item
    • All Fields
    • Source Title
    • Year
    • Publisher
    • Title
    • Subject
    • Author
    • DOI
    • ISBN
    Advanced Search
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Archive

    An Experimental Study of Mist/Air Film Cooling On a Flat Plate With Application to Gas Turbine Airfoils—Part II: Two Phase Flow Measurements and Droplet Dynamics

    Source: Journal of Turbomachinery:;2014:;volume( 136 ):;issue: 007::page 71007
    Author:
    Zhao, Lei
    ,
    Wang, Ting
    DOI: 10.1115/1.4025738
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A phase Doppler particle analyzer (PDPA) system is employed to measure the twophase mist flow behavior including flow velocity field, droplet size distribution, droplet dynamics, and turbulence characteristics. Based on the droplet measurements made through PDPA, a projected profile describing how the airmist coolant jet flow spreads and eventually blends into the hot main flow is proposed. This proposed profile is found to be well supported by the measurement results of the turbulent Reynolds stresses. The coolant film envelope is identified with shear layers characterized by higher magnitudes of turbulent Reynolds stresses. In addition, the separation between the mist droplet layer and the coolant air film is identified through the droplet measurements—large droplets penetrate through the air coolant film layer and travel further into the main flow. With the proposed airmist film profile, the heat transfer results on the wall presented in Part I are reexamined and more indepth physics is revealed. It is found that the location of the optimum cooling effectiveness coincides with the point where the airmist coolant stream starts to bend back towards the surface. Thus, the data suggests that the “bending backâ€‌ film pattern is critical in keeping the mist droplets close to the surface, which improves the cooling effectiveness for mist cooling.
    • Download: (2.369Mb)
    • Show Full MetaData Hide Full MetaData
    • Get RIS
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      An Experimental Study of Mist/Air Film Cooling On a Flat Plate With Application to Gas Turbine Airfoils—Part II: Two Phase Flow Measurements and Droplet Dynamics

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/156630
    Collections
    • Journal of Turbomachinery

    Show full item record

    contributor authorZhao, Lei
    contributor authorWang, Ting
    date accessioned2017-05-09T01:13:42Z
    date available2017-05-09T01:13:42Z
    date issued2014
    identifier issn0889-504X
    identifier otherturb_136_07_071007.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/156630
    description abstractA phase Doppler particle analyzer (PDPA) system is employed to measure the twophase mist flow behavior including flow velocity field, droplet size distribution, droplet dynamics, and turbulence characteristics. Based on the droplet measurements made through PDPA, a projected profile describing how the airmist coolant jet flow spreads and eventually blends into the hot main flow is proposed. This proposed profile is found to be well supported by the measurement results of the turbulent Reynolds stresses. The coolant film envelope is identified with shear layers characterized by higher magnitudes of turbulent Reynolds stresses. In addition, the separation between the mist droplet layer and the coolant air film is identified through the droplet measurements—large droplets penetrate through the air coolant film layer and travel further into the main flow. With the proposed airmist film profile, the heat transfer results on the wall presented in Part I are reexamined and more indepth physics is revealed. It is found that the location of the optimum cooling effectiveness coincides with the point where the airmist coolant stream starts to bend back towards the surface. Thus, the data suggests that the “bending backâ€‌ film pattern is critical in keeping the mist droplets close to the surface, which improves the cooling effectiveness for mist cooling.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAn Experimental Study of Mist/Air Film Cooling On a Flat Plate With Application to Gas Turbine Airfoils—Part II: Two Phase Flow Measurements and Droplet Dynamics
    typeJournal Paper
    journal volume136
    journal issue7
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.4025738
    journal fristpage71007
    journal lastpage71007
    identifier eissn1528-8900
    treeJournal of Turbomachinery:;2014:;volume( 136 ):;issue: 007
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian