Visualization experiment of two-phase flow in parallel flow heat pipe

被引：0
|
作者：
Shen C. [1 ]
Liu Y. [1 ]
Wang Z. [1 ]
Zhang D. [2 ]
Yang J. [1 ]
Wei X. [2 ]
机构：
[1] College of Civil Engineering, Zhengzhou University, Zhengzhou
[2] School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 05期
关键词：
Flow; Heat transfer; Parallel flow heat pipe; Two-phase flow; Visualization;
D O I：
10.11949/0438-1157.20201269
中图分类号：
学科分类号：
摘要：
The parallel flow heat pipe heat exchanger integrates the advantages of high efficiency heat exchange in the axial direction of the heat pipe and high efficiency heat exchange outside the parallel flow heat exchanger, and is a new type of heat pipe heat exchanger. In order to study the working mechanism and the flow process of the parallel flow heat pipe, a visualization experimental rig was set up, and the startup characteristic and the heat and mass transfer law of parallel flow heat pipe under different structural parameters, different heating powers and different working mediums were experimentally studied combined with high speed camera technology and infrared-ray test technology. The results show that the working mechanism of the parallel flow heat pipe is complicated. The gas column and the liquid column in the tube carry out the mutual oscillating flow due to the gravity and unbalanced pressure in the parallel multiple pipelines. Moreover, the flow patterns in the branch pipe are varied, including bubble flow, slug flow, annular flow and the like. At the same time, it is found that larger diameter and higher heating power will aggravate the oscillating flow between parallel pipelines, increase the disturbance of the working medium in the evaporation section and the condensation section, and enhance heat transfer performance of heat pipe. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：2506 / 2513
页数：7
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