Startup characteristics of a dual compensation chamber loop heat pipe with an extended bayonet tube
Startup characteristics of a dual compensation chamber loop heat pipe with an extended bayonet tube
复制标题
DOI：
10.1016/j.ijheatmasstransfer.2019.119066
复制
发表时间：
2020-02
影响因子：
5.2
通讯作者：
L. Bai;Y. Tao;Yuandong Guo;G. Lin;G. Lin
中科院分区：
文献类型：
--
作者：
L. Bai;Y. Tao;Yuandong Guo;G. Lin;G. Lin
双补偿室环路热管（DCCLHP）是一种先进的两相传热装置，具有在地面环境中无方向运行的特点，在飞机热管理中具有巨大的应用潜力。在这项工作中，DCCLHP与扩展的卡口管的设计和制造，旨在提高其启动性能，特别是在一个小的热负荷。实验研究了DCCLHP在五种不同方位下的启动特性，并进行了理论分析。实验结果表明：1）带延长卡口管的直流侧冷源热泵在水平方向10 ~ 100 W的热负荷下均能成功启动，且无启动失败现象。2)DCCLHP在地面环境中，即使在-90°至+90°倾角的10 W的小热负荷下也能成功启动。3)在实验中观察到不同的启动现象，如独特的变化的温度过冲。4)在启动过程中出现了温度振荡等运行不稳定现象。
Dual compensation chamber loop heat pipe (DCCLHP) is an advanced two-phase heat transfer device, which features an orientation-free operation in the terrestrial surroundings and promises great application potential in the aircraft thermal management. In this work, a DCCLHP with an extended bayonet tube was designed and fabricated, aiming to improve its startup performance especially at a small heat load. The startup characteristics of the DCCLHP in five different orientations was experimentally investigated and theoretically analyzed. According to the experimental results, some important conclusions have been drawn: 1) The DCCLHP with an extended bayonet tube could achieve successful startup under the heat load ranging from 10 to 100 W in the horizontal orientation, and no startup failure occurred. 2) The DCCLHP could start up successfully even at a small heat load of 10 W from -90° to +90° tilt angle in the terrestrial surroundings. 3) Different startup phenomena such as the unique change of the temperature overshoot were observed in the experiments. 4) Operating instability such as the temperature oscillation occurred during the startup process in the favorable directions.