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Journal of Enhanced Heat Transfer
Facteur d'impact: 0.562 Facteur d'impact sur 5 ans: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Imprimer: 1065-5131
ISSN En ligne: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2012001211
pages 249-257

NUMERICAL STUDY OF ROTATION EFFECTS ON MICROCHANNEL FLOW AND HEAT-TRANSFER PERFORMANCE

You-min Xi
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
Hong-xia Gao
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
Jian-zu Yu
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
Yongqi Xie
School of Aeronautic Science and Engineering, Beihang University, Beijing, 100191, China

RÉSUMÉ

The use of microchannels is one of the most promising and investigated routes for removing the high heat concentrations generated by avionic electronic circuits. Modern aircraft with high maneuverability are always subject to severe acceleration, so various dynamic characteristics of the coolant greatly affect the flow and heat-transfer performance in microchannels. To evaluate these influences, microchannels with various aspect ratios have been modeled numerically under conditions of acceleration. The three-dimensional governing equations for mass, momentum, and energy have been solved using an implicit finite-volume scheme. The results show that the flow and heat-transfer performance in microchannels is affected by the flow state, force state, and channel geometry parameters. These make heat-transfer characteristics in microchannels a complicated issue in an acceleration environment.


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