Thermal Operational Characteristics of a Small-Loop Heat Pipe
Thermal Operational Characteristics of a Small-Loop Heat Pipe
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DOI：
10.2514/2.6805
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发表时间：
2003-10
影响因子：
2.1
通讯作者：
T. Kaya;J. Ku
中科院分区：
文献类型：
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作者：
T. Kaya;J. Ku
本文研究了小环热管的独特热工特性。试验是在不同的热负荷和冷凝器水槽温度下在LHP的不同方向上进行的。展示了在低至5W的热负荷下成功启动的情况。为了研究加速力的影响，在旋转工作台上对小型LHP进行了试验。加速力增加了LHP内部的压力降，改变了流体分布，从而影响了LHP的启动特性和运行温度。旋转试验表明，LHP在加速力的作用下运行成功。所建立的稳态数学模型可用于评估LHP在加速力作用下影响运行温度的主要因素。随着LHP尺寸的减小，LHP性能特性的数学建模变得更加困难。为了更好地预测小型LHP的特性，对蒸发器核心进行更详细的建模是必不可少的。
This study investigates the distinctive thermal operational characteristics of a small-loop heat pipe (LHP). Tests are conducted under varying heat load and condenser sink temperatures at different orientations of the LHP. Successful startups at heat loads as low as 5 W are demonstrated. To investigate the effect of accelerating forces, the small LHP is tested on a spin table. Accelerating forces impose an additional pressure drop and change the fluid distribution inside the LHP, thereby affecting the startup characteristics and the LHP operating temperature. Spin tests have demonstrated successful operation of the LHP under accelerating forces. The steady-state mathematical model proves to be useful for assessment of the main factors influencing the operating temperature when the LHP is subjected to accelerating forces. The mathematical modeling of the LHP performance characteristics becomes more difficult as the size of the LHP decreases. For a better prediction of the small LHP characteristics, more detailed modeling of the evaporator core is essential.