Abstract

A theory of heat transfer at condensation of liquid vapors on the tube wall has been developed. The theory presents pores near the wall of a horizontal tube placed into a granular layer as flat slots with hydraulic diameter corresponding to the layer porosity. A generalizing relationship for the Nusselt number, agreeing with experimental data, has been found. The limit solution for the heat transfer on a smooth horizontal tube at condensation was obtained on the basis of the formulated statement of the problem. This solution describes the known experimental data and data of this paper better than the Nusselt theoretical dependence does.

中文翻译：

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颗粒层水平管上固定蒸汽冷凝时的传热

摘要

已经发展了在管壁上冷凝液体蒸汽的传热理论。该理论将放置在颗粒层中的水平管壁附近的孔呈现为扁平槽，其水力直径对应于层孔隙率。已发现与实验数据一致的努塞尔数的泛化关系。在对问题的表述的基础上，得到了光滑水平管冷凝时传热的极限解。该解决方案比努塞尔理论依赖性更好地描述了已知的实验数据和本文的数据。