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ISSN 打印: 1064-2285
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传热学

DOI: 10.1615/HeatTransRes.v32.i7-8.140
9 pages

Convective Heat and Mass Transfer for Nonuniform Heat Generation in Twisted Rod Bundles

Boris V. Dzyubenko
Moscow Aviation Institute (State Technical University), 4 Volokolamskoe Highway, Moscow, 125993, Russia
Guenrikh A. Dreitser
Department of Aviation-Space Thermal Techniques, Moscow Aviation Institute, Volokolamskoe shosse, 4, Moscow, 125993, Russia

ABSTRACT

The results of experimental and theoretical studies of steady and unsteady convective heat and mass transfer in twisted rod bundles are presented. New generalizing relations are derived to calculate effective turbulent transfer coefficients used to close a system of equations describing thermal and hydraulic processes in such rod bundles. The physical phenomena that characterize the specific features of heat and mass transfer for different types of unsteadiness are considered. The developed empirical method for closing a system of equations is based on both the hypothesis for local similarity of transfer and mathematical formalism in solving the problems.


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