An Experimental Investigation on the Influence of Copper Ageing on Flow Boiling in a Copper Microchannel
An Experimental Investigation on the Influence of Copper Ageing on Flow Boiling in a Copper Microchannel
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铜老化对铜微通道内流动沸腾影响的实验研究
DOI：
10.1080/01457632.2018.1540459
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发表时间：
2019
影响因子：
2.3
通讯作者：
Sarit K. Das
中科院分区：
文献类型：
--
作者：
P. Jayaramu;S. Gedupudi;Sarit K. Das
本文报道了在水力直径为0.324和0.658 mm的两种不同直径的铜微通道内，铜的时效对流动沸腾传热和压降的影响。在实验运行之间的不同时间间隔进行了实验。随着时间的推移，在两相传热系数的减少，注意到，可能是由于氧化层的生长。对新鲜样品和实验后样品的能量色散X射线光谱分析表明氧化层的生长。使用光学轮廓仪获得的共焦显微镜图像和三维粗糙度分布也表明表面纹理的变化。两相传热系数的恶化归因于氧化引起的表面润湿性增加。传热系数的减少率是较高的热通量和较小的水力直径。还注意到两相压降的小幅增加。研究中讨论了可能的氧化来源。研究表明，在设计和运行铜基两相微通道热沉时，应考虑铜的老化因素。
Abstract The study reports the experimental investigation on the influence of copper ageing on flow boiling heat transfer and pressure drop in copper microchannels of two different hydraulic diameters, 0.324 and 0.658 mm. Experiments have been conducted for different time intervals between the experimental runs. A reduction in the two-phase heat transfer coefficient was noticed with time, possibly due to the growth of oxidation layer. Energy-dispersive X-ray spectroscopy analyses of the fresh sample and the sample after the experiments indicated the growth of oxidation layer. Confocal microscope images and three-dimensional roughness profiles obtained using an optical profilometer also indicated a change in the surface texture. Deterioration in two-phase heat transfer coefficient was attributed to the increased surface wettability caused by the oxidation. The rate of reduction in heat transfer coefficient was higher for higher heat fluxes and smaller hydraulic diameter. A small increase in two-phase pressure drop was also noticed. Possible sources of oxidation were discussed in the study. The study underlines that the copper ageing factor be taken into account for the design and operation of two-phase microchannel heat sinks with copper substrate.
影响因子：
6.4
作者：
Karayiannis, T. G.;Mahmoud, M. M.
通讯作者：
Mahmoud, M. M.