A preliminary study on material effects of critical heat flux for downward-facing flow boiling
A preliminary study on material effects of critical heat flux for downward-facing flow boiling
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DOI：
10.1016/j.net.2021.03.024
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发表时间：
2021-04
影响因子：
2.7
通讯作者：
Kai Wang;Chun-Yen Li;K. Uesugi;N. Erkan;K. Okamoto
中科院分区：
文献类型：
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作者：
Kai Wang;Chun-Yen Li;K. Uesugi;N. Erkan;K. Okamoto
在本研究中，进行了向下流动沸腾实验，研究了物料对CHF的影响。实验用铝、铜和碳钢进行。发现不同材料的chf不同。铝的CHF最大，而铜的CHF最低。实验后，表面润湿性增加，表面变得粗糙，这可能是由于核沸腾过程中的氧化过程。CHF差异可能与表面润湿性、粗糙度和热渗出率有关，这些因素影响气泡行为，进而影响CHF。需要进一步的研究来确定哪个因素起主导作用。
In this study, experiments of downward-facing flow boiling were conducted to investigate material effects on CHF. Experiments were conducted using aluminum, copper, and carbon steel. It was found that different materials had different CHFs. Aluminum has the biggest CHF while copper has the lowest CHF for each mass flux. After experiment, surface wettability increased and surface became rougher, which was probably due to the oxidation process during nucleate boiling. The CHF difference is likely to be related to the surface wettability, roughness and thermal effusivity, which influences the bubble behavior and in turn affects CHF. Further studies are needed to determine which factor is dominant.