Correlation between the dynamic velocity and average heat transfer coefficient in transversely streamlined in-line and staggered tube bundles
V.I. Rachkov, V.N. Fedoseev, M.I. Pisarevskiy, M.I. Pisarevskaya
a:2:{s:4:"TYPE";s:4:"HTML";s:4:"TEXT";s:65:"National Research Nuclear University «MEPhI», Moscow, Russia";}
Keywords: heat transfer coefficient, in-line tube bundles, staggered tube bundles, dynamic velocity, dissipation energy
Abstract
On the basis of the analysis of a large array of experimental data on average heat transfer and hydraulic resistance, calculations of the dynamic velocity on the wall in deep rows of in-line and staggered tube bundles transversely streamlined by the turbulent flow of the coolant are performed. In addition, energy consumption is calculated based on experimental data on the hydraulic resistance of rod assemblies. The obtained results serve to determine the coefficient of proportionality between the dynamic velocity and the energy consumption for pumping the coolant. The proposed calculation formulas for the proportionality coefficient allow computing the average heat transfer coefficient in transversely streamlined in-line and staggered tube bundles in a wide range of rod packing spacings and Reynolds numbers, using the universal dependence of heat transfer on dynamic velocity.
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