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Heat Transfer Research
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ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v40.i5.50
pages 415-430

Heat Transfer by a High-Temperature Gas Flow in the Cooled Units of Heat Exchangers

Algimantas Ambrazevicius
Lietuvos karo akademija, Silo g. 5A, LT-07104 Vilnius, Lithuania
Pranas Valatkevicius
Lithuanian Energy Institute, Breslaujos 3, LT-4440, Kaunas, Lithuania

RÉSUMÉ

This article presents the results of local heat-transfer research in high-temperature turbulent flows of two-atomic gases (air or nitrogen) in channels of three different geometries: stable and entrance regions of a circular tube, an annular tube, and complicated fibroids and rectangular inned banks.
Specific features of the dynamics and heat transfer of a high-temperature gas flow in the entrance region of annular tubes (x/d < 15) with and without interference and in separation and attachment zones have been determined. The obtained original correlations can be widely applied in practice.


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