微管径并联分离式热管可视化实验研究  

Experimental Study of the Visualization of Micro-Tube Parallel Separated Heat Pipe

作　　者：张志刚 齐航 ZHANG Zhigang;QI Hang(School of Energy and Safety Engineering,TCU,Tianjin 300384,China)

机构地区：[1]天津城建大学能源与安全工程学院,天津300384

出　　处：《天津城建大学学报》2018年第5期364-367,共4页Journal of Tianjin Chengjian University

基　　金：天津市自然科学基金(17JCYBJC21400)

摘　　要：为了更好地了解微管径并联分离式热管的运行特征,对一组毫米级的微管径并联分离式热管进行可视化实验研究.热管为透明玻璃管,实现对热管内工质流动状态的观察与分析.研究热管冷凝段壁面温度波动特性和传热量变化,揭示毫米级微管径热管内部工质的复杂流动状况,以此探究热管内部气液两相流的流动特征和换热机理.实验发现,不同加热温度下,热管管内工质流态大致有四种,即波动流、气弹状流、塞状流和振荡流.当加热温度为45℃时,并联分离式热管内更易出现振荡流,此时热管的传热量较大且传热热阻较低.In order to get better understanding of the operation characteristics of the micro-tube parallel separation heat pipe,the visualization experiment of a series of millimeter-scale parallel separated heat pipe has been carried out. The wall of heatpipe which is made of glass material realizes the observation and analysis of the working fluid state. By studying thecharacteristics of wall temperature fluctuation of condensation section and the change of heat transfer, the studies reveal thecomplex flow condition of working medium inside millimeter diameter heat pipe in order to explore the flow of gas-liquid twophases flow characteristics and heat transfer mechanism. The experimental results show that there are four types of flow statesinside the heat pipe under different heating temperatures：wave flow, slug flow, plug flow and oscillating flow. When theheating temperature is 45 ℃, the working fluid of the heat pipe is easy to reach the oscillating flow. Meanwhile the maximumheat transfer can be obtained and heat transfer resistance is lower under this heating temperature.

关 键 词：并联分离式 热管 可视化 流型 传热热阻 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]