Unstable operations like temperature oscillation often occur in loop heat pipes (LHPs) and therefore restrict their applications. Such instability issues are strongly related to the LHP structure, heat load, working fluid, filling ratio, gravity acceleration, and other factors. The mechanism of temperature oscillation of LHP is studied both experimentally and theoretically by investigating the vapor-liquid two-phase flow and its instability, which is directly related to temperature oscillation. A unique criterion formula was found to predict the occurrence of flow-related temperature oscillation. The results were validated by experiment. The study provides a theoretical basis for exploring ways to suppress temperature oscillations of LHPs.

中文翻译：

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平板式热管的温度振荡机理

诸如温度振荡之类的不稳定操作通常在回路热管（LHP）中发生，因此限制了它们的应用。这种不稳定性问题与LHP结构，热负荷，工作流体，填充比，重力加速度和其他因素密切相关。通过研究气液两相流及其不稳定性，对LHP的温度振荡机理进行了实验和理论研究，这与温度振荡直接相关。发现了唯一的标准公式来预测与流量相关的温度振荡的发生。实验验证了结果。该研究为探索抑制LHPs温度振荡的方法提供了理论基础。