A review of flow and heat transfer characteristics in curved tubes
A review of flow and heat transfer characteristics in curved tubes
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DOI：
10.1016/j.rser.2004.09.014
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发表时间：
2006-10
影响因子：
15.9
通讯作者：
P. Naphon;S. Wongwises
中科院分区：
文献类型：
--
作者：
P. Naphon;S. Wongwises
通过强化传热技术可以提高换热器的性能，使其能够完成一定的传热任务。一般来说，这些技术可以分为两组：主动和被动技术。主动技术需要外力，例如电场、声或表面振动等。被动技术需要流体添加剂或特殊的表面几何形状。弯曲管已被用作被动传热强化技术之一，并且是在几种传热应用中使用最广泛的管。本文综述了国内外关于单相和两相流在弯管内的传热和流动特性的研究进展。介绍了三种主要的弯管：螺旋盘管、螺旋盘管和其他盘管。本文综述了已发表的单相传热系数和单相、两相摩擦系数的相关关联式。
The performance of heat exchangers can be improved to perform a certain heat-transfer duty by heat transfer enhancement techniques. In general, these techniques can be divided into two groups: active and passive techniques. The active techniques require external forces, e.g. electric field, acoustic or surface vibration, etc. The passive techniques require fluid additives or special surface geometries. Curved tubes have been used as one of the passive heat transfer enhancement techniques and are the most widely used tubes in several heat transfer applications. This article provides a literature review on heat transfer and flow characteristics of single-phase and two-phase flow in curved tubes. Three main categories of curved tubes; helically coiled tubes, spirally coiled tubes, and other coiled tubes, are described. A review of published relevant correlations of single-phase heat transfer coefficients and single-phase, two-phase friction factors are presented.