Given the highly complex thermo-hydrodynamic features in heat pipes (HPs) but the inevitable need for efficient thermal solutions, this study investigated the effects of various wick types on the time-dependent thermal behavior of HPs. The results revealed that varying the cooling conditions and wick types in parallel is necessary for peak performance. Appropriate cooling lengths and temperatures improve the thermal limits of HPs with low-performing wicks. The composite wicks prompted faster steady performance, smooth startup, and low instabilities. Heat increment from 25 to 200 W decreased the thermal resistance from 1.75 to 0.05 °C/W. The HPs with homogeneous wicks have higher thermal resistance than those with composite wicks. Increased cooling lengths improve the performance of the former HPs. Inclining the HPs at angles relative to the horizontal position improves the HPs' thermal limits. The composite wicks minimized the effects of inclinations on the HPs’ performance. The HPs with composite multi-layered wicks presented transient profiles typical of first-order systems, whereas homogenous multi-layered wicks have complex responses upon step heat input. The transient profiles offer great insight into the instability inside the HPs. This study may guide future optimization analysis in selecting the best HPs and wicks for improved thermal management.

鉴于热管（HP）中高度复杂的热流体动力学特征，但不可避免地需要高效的热解决方案，本研究调查了各种灯芯类型对HPs随时间变化的热行为的影响。结果表明，并行改变冷却条件和灯芯类型对于达到最佳性能是必不可少的。适当的冷却长度和温度可改善性能低的灯芯的HP的热极限。复合灯芯可促进更快的稳定性能，平稳的启动和较低的不稳定性。从25 W到200 W的热量增加将热阻从1.75降低到0.05°C / W。具有均质吸芯的HP具有比具有复合吸芯的HP高的耐热性。增加的冷却长度可以改善以前的HP的性能。使HP相对于水平位置倾斜可以改善HP的热极限。复合灯芯最大程度地减少了倾斜对HP性能的影响。带有复合多层灯芯的HP表现出一阶系统的典型瞬态曲线，而同质多层灯芯在步进热量输入时具有复杂的响应。瞬态曲线可让您深入了解HP内部的不稳定性。这项研究可以指导未来的优化分析，以选择最佳的HP和灯芯来改善热管理。而均匀的多层灯芯在步进热量输入时具有复杂的响应。瞬态曲线可让您深入了解HP内部的不稳定性。这项研究可以指导未来的优化分析，以选择最佳的HP和灯芯来改善热管理。而均匀的多层灯芯在步进热量输入时具有复杂的响应。瞬态曲线可让您深入了解HP内部的不稳定性。这项研究可以指导未来的优化分析，以选择最佳的HP和灯芯来改善热管理。