期刊
NUCLEAR ENGINEERING AND DESIGN
卷 278, 期 -, 页码 367-376出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.nucengdes.2014.06.042
关键词
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资金
- BK21+ program through the National Research Foundation of Korea - Ministry of Education, Science and Technology
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [NRF-2013M2A8A1040987]
- Nuclear Safety Research Program of the Korea Radiation Safety Foundation - Korean government (NSSC) [1305008-0113-HD140]
- National Research Foundation of Korea [2013M2A8A1040987] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, we observed the behavior of water droplets near the Leidenfrost point (LFP) on zirconium alloy surfaces with anodizing treatment and investigated the droplet cooling performance. The anodized zirconium surface, which consists of bundles of nanotubes (similar to 10-100 nm) or micro-mountain-like structures, improved the wetting characteristics of the surface. A deionized water droplet (6 pi) was dropped onto test surfaces heated to temperatures ranging from 250 degrees C to the LFP. The droplet dynamics were investigated through high-speed visualization, and the cooling performance was discussed in terms of the droplet evaporation time. The modified surface provided vigorous, intensive nucleate boiling in comparison with a clean, bare surface. Additionally, we observed that the structured surface had a delayed LFP due to the high wetting condition induced by strong capillary wicking forces on the structured surface. (C) 2014 Elsevier B.V. All rights reserved.
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