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针对11种不同压扁形式的小型轴向槽道热管进行实验研究,分析了压扁形式、压扁厚度和工作温度对轴向温度分布、热阻、极限传输功率以及蒸发段和冷凝段的相变换热系数的影响.实验研究表明,各种形式的槽道热管在正常工况下,均可以保持良好的等温性.热管的几何结构对极限传输功率的影响较明显.对于蒸发段2mm厚的热管,冷凝段厚度从2mm增加到3mm,极限传输功率增加81%;而对于蒸发段厚度为3mm的热管,冷凝段厚度从2mm增加到3mm,极限传输功率增加134%.对于冷凝段4mm厚的热管,蒸发段厚度从2mm增加到3mm,极限传输功率增加26%.蒸发段厚度每增加1mm,极限传输功率增加9%~26%,而冷凝段厚度每增加1mm,极限传输功率增加20%~86%.冷凝段厚度对热管传热性能的影响要比蒸发段厚度大.本文的研究内容对了解槽道热管传热性能及电子热设计过程将会有所帮助.
In this paper, eleven kinds of small-scale axial channel heat pipes with different types of flattening were studied. The effects of flattening, flattening thickness and operating temperature on the axial temperature distribution, thermal resistance, ultimate transmission power and phase of evaporation and condensation The experimental results show that all kinds of channel heat pipes can maintain good isothermal properties under normal operating conditions.The geometric structure of heat pipes has an obvious effect on the ultimate transmission power.For the 2mm thick Of the heat pipe, the condensation section thickness increased from 2mm to 3mm, the ultimate transmission power increased by 81%; and the evaporation section thickness of 3mm heat pipe, the condensation section thickness increased from 2mm to 3mm, the ultimate transmission power increased by 134% .For the condensation section 4mm thick Of the heat pipe, evaporating section thickness increased from 2mm to 3mm, the ultimate transmission power increased by 26% .Elimination of the evaporation section thickness increased by 9% ~ 26% for each additional 1mm, while the condensation section thickness increased by 1mm, the ultimate transmission power increased by 20% ~ 86% .The thickness of the condensation section has a greater influence on the heat transfer performance of the heat pipe than that of the evaporation section.This study will be helpful to understand the heat transfer performance of the channel heat pipe and the electronic thermal design process.