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首页> 外文期刊>International Journal of Heat and Mass Transfer >A heat transfer correlation of flow boiling in micro-finned helically coiled tube
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A heat transfer correlation of flow boiling in micro-finned helically coiled tube

机译：微翅片螺旋管中沸腾的传热相关性

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摘要

Two main mechanisms, nucleate boiling and convective boiling, are widely accepted for in-tube flow boiling. Since the active nuclei on the heated wall are dominant for nucleate boiling and flow pattern governs the convective boiling, the heat transfer coefficient is strongly influenced by the wall heat flux, mass flux and vapor quality, respectively. In practical industrial applications, for example, the evaporators in refrigeration, forced convective evaporation is the dominant process and high heat transfer efficiency can be obtained under smaller temperature difference between wall and liquid. Therefore, it is of importance to develop a correlation of convective boiling heat transfer with a good accuracy. In this paper, a new kind of micro-finned helically coiled tube was developed and the flow boiling heat transfer characteristics were experimentally studied with R134a. Based on the analysis of the mechanisms of flow boiling, heat transfer correlations of the specific micro-finned helically coiled tubes are obtained.
机译：管内流动沸腾被广泛接受两种主要机理，即成核沸腾和对流沸腾。由于加热壁上的活性核是核沸腾的主要因素，而流型控制对流沸腾，因此传热系数分别受到壁热通量，质量通量和蒸汽质量的强烈影响。在实际的工业应用中，例如，制冷中的蒸发器，强制对流蒸发是主要过程，并且在壁和液体之间的温差较小的情况下可以获得较高的传热效率。因此，重要的是要开发具有高精度的对流沸腾传热。本文研制了一种新型的微翅片螺旋盘管，并用R134a对流沸腾换热特性进行了实验研究。基于对流沸腾机理的分析，获得了特定的微翅片螺旋盘管的传热相关性。

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