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    Numerical study of effusion cooling flow and heat transfer

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    Authors
    Walton, Matthew
    Yang, Zhiyin cc
    Affiliation
    University of Derby
    Issue Date
    2014
    
    Metadata
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    Abstract
    An isothermal and non-isothermal numerical study of effusion cooling flow and heat transfer is conducted using a Reynolds-averaged Navier–Stokes (RANS) approach. A Reynolds stress transport (RST) turbulence model is used to predict the flow field of a staggered array of 12 rows of effusion holes, each hole inclined at 30° to the flat plate. The Reynolds number based on the hole diameter and jet exit velocity is 3800. The blowing ratio in both studies is 5. A conjugate heat transfer approach is adopted in the non-isothermal simulation. For the isothermal case, the RST model is shown to be capable of predicting the injection, penetration, downstream decay and lateral mixing of the effusion jets reasonably well. In addition, the numerical model captures the existence of two counter-rotating vortices emanating from each hole, which causes the entrainment of combustor flow towards the surface of the plate at the leading edge and downstream, influences the mixing of accumulated coolant flow, providing a more uniform surface temperature across the plate. The presence and characteristics of these vortices are in good agreement with previously published research. In the non-isothermal case, the laterally averaged cooling effectiveness across the plate is under-predicted but the trend conforms to that exhibited during experimentation.
    Citation
    Walton, M. and Yang, Z. (2014) 'Numerical study of effusion cooling flow and heat transfer', International Journal of Computational Methods and Experimental Measurements, 2 (4) DOI: 10.2495/CMEM-V2-N4-331-345
    Publisher
    WIT Press
    Journal
    International Journal of Computational Methods and Experimental Measurements
    URI
    http://hdl.handle.net/10545/620635
    DOI
    10.2495/CMEM-V2-N4-331-345
    Additional Links
    http://www.witpress.com/elibrary/cmem-volumes/2/4/885
    http://www.witpress.com/journals/cmem
    Type
    Article
    Language
    en
    ISSN
    2046-0546
    ae974a485f413a2113503eed53cd6c53
    10.2495/CMEM-V2-N4-331-345
    Scopus Count
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    Department of Mechanical Engineering & the Built Environment

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