卧式螺旋管内流动换热壁温分布特性

doi:10.3969/j.issn.0438-1157.2014.z1.024

化工学报 ›› 2014, Vol. 65 ›› Issue (S1): 152-156.DOI: 10.3969/j.issn.0438-1157.2014.z1.024

卧式螺旋管内流动换热壁温分布特性

逯国强, 韩吉田, 孔令健, 陈常念, 冀翠莲

山东大学能源与动力工程学院, 山东济南 250061

收稿日期:2014-01-24 修回日期:2014-02-13 出版日期:2014-05-30 发布日期:2014-05-30
通讯作者: 韩吉田
基金资助:
国家自然科学基金项目（51076084）。

Wall temperature distribution characteristics of flow and heat transfer inside horizontal helically-coiled tube

LU Guoqiang, HAN Jitian, KONG Lingjian, CHEN Changnian, JI Cuilian

School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China

Received:2014-01-24 Revised:2014-02-13 Online:2014-05-30 Published:2014-05-30
Supported by:
supported by the National Natural Science Foundation of China(51076084).

摘要/Abstract

摘要： 螺旋管是一种高效换热管型，在卧式螺旋管内流动时受到重力和离心力的作用，工质流动方向时刻改变，产生二次回流，从而表现出了不同于其他管型的流动与传热特性。以卧式螺旋管为研究对象，选取底部截面、上升段截面、顶部截面三个具有代表性的位置截面，采用逐渐增大热通量法研究了其在单相对流和过冷沸腾条件下壁温的分布特性。为螺旋管换热器的设计与应用提供了参考依据。

关键词: 卧式螺旋管, 传热, 单相流动, 对流, 过冷沸腾, 分布

Abstract: Helically-coiled tube is a kind of high-efficiency heat transfer tube. When fluid flows in horizontal helically-coiled tube it will be affected by gravity and centrifugal forces, and the flow direction changes from time to time, resulting in secondary flow and thus behaving different flow and heat transfer characteristics from those in other tubes. In order to explore the temperature distribution characteristics of the inner tube wall when fluid flows in single phase and under subcooled boiling, the inner tube wall temperatures on the bottom, the rising part and the top cross sections selected in a horizontal helically-coiled tube are experimentally studied by means of increasing the heat flux gradually. Factors which result in these characteristics are explained in detail. The completed work has significance of reference for the design and engineering applications of helically-coiled tube heat exchangers.

Key words: horizontal helically-coiled tube, heat transfer, single phase flow, convection, subcooled boiling, distributions

中图分类号:

TK124

逯国强, 韩吉田, 孔令健, 陈常念, 冀翠莲. 卧式螺旋管内流动换热壁温分布特性[J]. 化工学报, 2014, 65(S1): 152-156.

LU Guoqiang, HAN Jitian, KONG Lingjian, CHEN Changnian, JI Cuilian. Wall temperature distribution characteristics of flow and heat transfer inside horizontal helically-coiled tube[J]. CIESC Journal, 2014, 65(S1): 152-156.

参考文献 12

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卧式螺旋管内流动换热壁温分布特性

Wall temperature distribution characteristics of flow and heat transfer inside horizontal helically-coiled tube

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