新型拐角式整体针翅回转热管设计与试验

提出了一种新型拐角式整体针翅回转热管,对该热管进行了详细的理论分析与设计,并对其传热性能进行了试验测试。结果表明:拐角式整体针翅回转热管的轴向温度从蒸发段到冷凝段逐渐降低,最大轴向温差随着转速的增大而减小;回转热管蒸发段的管壁温度沿圆周方向上的温差随转速的增大而变大,冷凝段的管壁温度沿圆周方向上的温差随转速增大而变小;回转热管的整体传热功率随转速的提高而增大;当充液率约为15%时回转热管的热阻最小,传热性能最好;吸液芯对热管传热性能的影响不占主导地位,在低转速工况下吸液芯提高热管传热能力,在高转速下则起阻碍作用;与平行轴回转热管相比,拐角式回转热管传热性能提高了5倍。

Design and Test of a New Elbow Type Integral Pin-fin Rotary Heat Pipe

Proposed was a new elbow type integral pin-fin rotary heat pipe.A detailed theoretical design and analysis were performed of the heat pipe under discussion.Moreover,the heat transfer performance of the heat pipe was also tested.It has been found that the temperature of the heat pipe along the axial direction will gradually decrease from the vaporization section to the condensing section and the maximum axial temperature difference will decrease with an increase of the rotating speed.The tube wall temperature of the vaporization section of the heat pipe along the circumferential direction will increase while that of the condensing section will decrease with an increase of the rotating speed.The overall heat transfer-converted power of the heat pipe will increase with an increase of the rotating speed.When the liquid filling rate is about 15%,the heat resistance of the heat pipe will be the minimum with the heat transfer performance being the best.The influence of the liquid absorption core on the heat transfer performance of the heat pipe will not dominate.At a low speed,the liquid absorption core can enhance the heat transfer capacity while at a high speed,it will lower its heat transfer capacity.Compared with the heat transfer performance of a parallel axis rotary heat pipe,that of the elbow type rotary heat pipe increases by 6 times.