Study on Thermal Mixing of MHD Liquid Metal Free-Surface Film Flow
Study on Thermal Mixing of MHD Liquid Metal Free-Surface Film Flow
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MHD液态金属自由表面膜流热混合研究
DOI：
10.1080/15361055.2017.1347457
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发表时间：
2017
影响因子：
0.9
通讯作者：
Gilson Erik P.
中科院分区：
文献类型：
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作者：
Kusumi Koji;Kunugi Tomoaki;Yokomine Takehiko;Kawara Zensaku;Kolemen Egemen;Ji Hantao;Gilson Erik P.
在这项研究中，温度分层的液态金属自由表面流的混合由安装在通道底部的三角翼障碍物已在横向磁场的存在下进行了实验和数值研究。通道的表面温度分布的测量，通过使用25热电偶（TC）嵌入在通道底部，下游的障碍物，这是位于上游的加热器安装在自由表面。实验是在湍流区进行的，其中Re = 12，000，在N = 0-5.02的范围内，存在横向磁场。对于层流区域，难以进行实验，因此使用Re = 2，300和N = 0-10的范围进行数值模拟。通过对层流区有无三角翼障碍物的数值计算结果的比较，发现有障碍物时整个温度分布比无障碍物时要暖。这与三角翼障碍物将增加热混合的预期是一致的。
In this study, the mixing of temperature-stratified liquid metal free-surface flow by a delta-wing obstacle installed on the channel bottom has been experimentally and numerically investigated in the presence of a transverse magnetic field. The surface temperature distribution of the channel was measured by using 25 thermocouples (TCs) embedded in the channel bottom, downstream of the obstacle, which was located upstream of the heater installed at the free-surface. The experiments were conducted for the turbulent flow region where Re = 12,000 and in the range of N = 0–5.02 in the presence of the transverse magnetic field. As for the laminar flow region, it is difficult to carry out the experiment, so the numerical simulations were conducted using Re = 2,300 and in the range of N = 0–10. According to the comparison of numerical results with and without the delta-wing obstacle in laminar flow region, the entire temperature distribution with the obstacle was warmer than that without the obstacle. This was consistent with the expectation that a delta-wing obstacle would increase thermal mixing.