Proposal of fluid stirring by multi-layered trenches for liquid metal divertor
Proposal of fluid stirring by multi-layered trenches for liquid metal divertor
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液态金属偏滤器多层沟槽搅拌流体的方案
DOI：
10.1016/j.fusengdes.2018.02.065
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发表时间：
2018
影响因子：
1.7
通讯作者：
Hashizume Hidetoshi
中科院分区：
文献类型：
--
作者：
Kawamoto Makoto;Muraoka Kenta;Ito Satoshi;Hashizume Hidetoshi
本文针对流动型液态金属偏滤器中液态金属的温度分层和蒸发问题，提出了一种新型的液态金属流动搅拌结构--“多层沟槽”结构，并对该结构诱导的液态金属流动特性进行了实验研究和数值模拟。利用环形通道模拟沟槽的原理验证实验成功地证明了在高达5 T的磁场下，液体金属的波形流动，其中曲折分量占主流的比例为27%。实验和三维磁流体动力学流动模拟也证明了波动流和涡量的大小随磁场的增加而增加。此外，二维传热模型模拟显示了波纹流的传热强化。最高温度比无波纹流时低26.6K。
This study proposes ″multi-layered trenches″ as a new liquid metal flow stirring structure for the flowing-type liquid metal divertor to prevent the temperature stratification and the evaporation of liquid metal.Then it investigates the characteristics of the liquid metal flow induced by this structure experimentally and numerically. The proof-of-principal experiment using a torus channel simulating the trenches successfully demonstrated the liquid metal wavy flow where the ratio of meandering component to the main stream was 27% under the magnetic field up to 5 T. The experiment and three-dimensional magnetohydrodynamics flow simulation also proved that magnitudes of the wavy flow and the vorticity increased with a rise in the magnetic field. Moreover, two-dimensional heat transfer model simulation showed the heat transfer enhancement by the wavy flow. Maximum temperature was 26.6 K lower than that in the case without the wavy flow.