Full visualization and startup performance of an ammonia pulsating heat pipe
Full visualization and startup performance of an ammonia pulsating heat pipe
复制标题
氨脉动热管的完整可视化和启动性能
DOI：
10.1016/j.jppr.2013.11.003
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发表时间：
2013
影响因子：
5.3
通讯作者：
Xie Minghui
中科院分区：
文献类型：
--
作者：
Zhihu Xue;Qu Wei;Xie Minghui
本文对以氨水为工质的脉动热管的全可视化和启动性能进行了实验研究。所测试的脉动热管由6匝组成，全部由外径为6mm、内径为2mm的石英玻璃管制成。填充率为70%。在一系列热输入下，记录了几个关键位置的壁温波动。利用高质量的数码摄像机对振荡和循环流动进行了可视化观察，使独特的热力学行为更容易识别和分析。实验结果表明，由于氨的特殊性质，氨脉冲热管的启动功率很小。在初始状态和运行状态下，段塞流中也存在一些不均匀的分布。观察到气泡破裂和段塞形成耦合的环流和局部振荡等现象。
In this paper, a novel study on full visualization and startup performances of pulsating heat pipe using ammonia as working fluid are experimented. The tested pulsating heat pipe, consisting of 6 turns, is fully made of quartz glass tubes with 6 mm outer diameter and 2 mm inner diameter. The filling ratio is 70%. Wall temperature fluctuations of several key positions are recorded under a series charge of heat inputs. The visualization investigation is conducted to observe the oscillations and circulation flows with the advantage of high quality digital video camera, by which the unique thermodynamic behaviors are able to recognize and analyze more easily. The experimental results show that the startup power required by the ammonia Pulsating Heat Pipe (PHP) is very small, owing to particular identities of ammonia. It is observed that there are also some unevenly distributions in slug-train during initial and operating state. Phenomena such as circulation flows and local oscillations coupling breaking up of bubbles and formation of slugs are observed.