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Computational flow and heat transfer of multiple circular jets impinging on a flat surface with effusion
Published in
2011
Volume: 47
   
Issue: 9
Pages: 1121 - 1132
Abstract
Computational investigations are reported on the local flow and heat transfer characteristics from staggered, multiple circular air jets impinging on a flat surface with effusion holes. The geometrical and flow parameters for the computational study are chosen as per the experimental arrangement of Cho and Rhee J Turbomachinery 123:601-608, (14) so as to explain salient features observed in these experiments. The two peaks in the Nusselt number observed in the case of H/D = 6 and three peaks in the case of H/D = 2 are attributed to the flow characteristics such as primary vortices forming an up-wash region, followed by secondary vortices resulting in a secondary stagnation zone. The magnitude of local peak in heat transfer increases up to 88% with increasing values of D/d from 0.5 to 1.5 at Re = 10,000. © 2011 Springer-Verlag.
About the journal
JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
ISSN09477411
Open AccessNo
Concepts (17)
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    Air jet
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    COMPUTATIONAL FLOWS
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    Computational investigation
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    Computational studies
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    EFFUSION HOLE
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    EXPERIMENTAL ARRANGEMENT
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    Flat surfaces
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    Flow characteristic
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    Flow parameters
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    JETS IMPINGING
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    Local flows
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    PRIMARY VORTEX
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    Salient features
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    SECONDARY VORTEX
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    STAGNATION ZONES
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    Nusselt number
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    Vortex flow