• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Enhanced pool boiling critical heat flux with a FeCrAl layer fabricated by DC sputtering
【24h】

Enhanced pool boiling critical heat flux with a FeCrAl layer fabricated by DC sputtering

机译：直流溅射法制备的FeCrAl层增强了池沸腾临界热通量

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

During the recent development of Accident Tolerant Fuels (ATFs), FeCrAl has received attention for its excellent high temperature performance and slower reaction kinetics with steam. In this study, we fabricated a FeCrAl layer on top of the metal substrate by DC sputtering. We found that the substrate temperature and sputtering time affected the surface characteristics of the FeCrAl-layered heaters. A substantial increase in surface roughness was realized in the substrate temperature range from 150 to 600 ℃ during DC sputtering. Extensive pool boiling critical heat flux (CHF) experiments were conducted to confirm the effect of the FeCrAl layer on the thermal safety margin of the heaters. Substantial CHF enhancement was achieved for the first time with all types of FeCrAl-layered heaters. The highest CHF enhancement (60%) was observed for the layer sputter deposited for 1 h at a substrate temperature of 150℃. State-of-the-art CHF models incorporating the textured surfaces were employed to elucidate the physical mechanism for the improved CHF. The enhanced CHF was attributed to an increase in the roughness factor at the micrometer scale. This, in turn, could have a desirable effect on shortening the rewetting interval with the FeCrAl-layered heaters. Systematic experiments related to the surface characteristics and high-speed bubble departure images were also obtained. This first-of-a-kind CHF enhancement with FeCrAl-layered heaters is expected to find use for an advanced fuel system.
机译：在最近的耐事故燃料（ATF）的发展中，FeCrAl因其出色的高温性能和较慢的与蒸汽的反应动力学而受到关注。在这项研究中，我们通过直流溅射在金属基板的顶部制作了FeCrAl层。我们发现基板温度和溅射时间会影响FeCrAl层状加热器的表面特性。在直流溅射过程中，在150至600℃的基板温度范围内，表面粗糙度大大提高。进行了广泛的池沸腾临界热通量（CHF）实验，以确认FeCrAl层对加热器的热安全裕度的影响。所有类型的FeCrAl层状加热器均首次实现了显着的CHF增强。在150℃的衬底温度下溅射1h时观察到最高的CHF增强（60％）。采用结合有纹理表面的最新CHF模型来阐明改进CHF的物理机制。 CHF的提高归因于微米级粗糙度系数的增加。反过来，这对于缩短FeCrAl层状加热器的再润湿间隔可能具有理想的效果。还获得了有关表面特性和高速气泡离开图像的系统实验。借助FeCrAl层状加热器的这种首次CHF增强有望用于先进的燃料系统。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2016年第11期|1293-1307|共15页
  • 作者

    Gwang Hyeok Seo; Gyoodong Jeun; Sung Joong Kim;

  • 作者单位

    Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;

    Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;

    Department of Nuclear Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea,Institute of Nano Science and Technology, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    FeCrAl; Accident Tolerant Fuels; DC sputtering; Critical heat flux; Surface roughness; Surface wettability;

    机译：铁铬铝;事故容忍燃料;直流溅射临界热通量;表面粗糙度;表面润湿性;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号