Thermophysical Properties of Biporous Heat Pipe Evaporators
Thermophysical Properties of Biporous Heat Pipe Evaporators
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DOI：
10.1115/1.2790020
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发表时间：
2008-02
影响因子：
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通讯作者：
T. Semenic;Ying-Yu Lin;I. Catton
中科院分区：
文献类型：
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作者：
T. Semenic;Ying-Yu Lin;I. Catton
以球形铜粉为原料，制备了3种不同团簇直径和5种不同粒径的30种双孔块体（15种组合，2次重复）和6种不同粒径的12种单孔块体，并对其热物理性能进行了测试。所有颗粒的颈部尺寸比约为0.4。单孔样品的孔隙率被认为是独立的颗粒直径，等于0.28，和双孔样品的孔隙率被认为是独立的簇和颗粒直径，等于0.64。液体渗透率和最大毛细压力的小孔被发现是一个线性函数的颗粒直径。类似地，发现蒸汽渗透率是簇直径的线性函数。在42±2°C下测量的单孔样品的热导率为142 ±3 W/mK，并且其与颗粒直径无关。发现双孔样品的热导率是簇与颗粒直径比的函数。
Thirty biporous slugs with 3 different cluster diameters and 5 different particle diameters (15 combinations with 2 repetitions) and 12 monoporous slugs with 6 different particle diameters were sintered from spherical copper powder, and thermophysical properties were measured. The neck size ratio for all the particles was approximately 0.4. The porosity of monoporous samples was found to be independent of particle diameter and was equal to 0.28, and the porosity of biporous samples was found to be independent of cluster and particle diameters, and was equal to 0.64. The liquid permeability and maximum capillary pressure of small pores were found to be a linear function of the particle diameter. Similarly, vapor permeability was found to be a linear function of the cluster diameter The thermal conductivity of monoporous samples was measured to be 142 ±3 WImK at 42±2°C, and it was independent of particle diameter The thermal conductivity of biporous samples was found to be a function of cluster to particle diameter ratio.