Measurement of lithium target surface velocity in the IFMIF/EVEDA lithium test loop
Measurement of lithium target surface velocity in the IFMIF/EVEDA lithium test loop
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IFMIF/EVEDA 锂测试环路中锂靶表面速度的测量
DOI：
10.1016/j.fusengdes.2015.10.030
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发表时间：
2016
影响因子：
1.7
通讯作者：
E. Wakai
中科院分区：
文献类型：
--
作者：
T. Kanemura;H. Kondo;T. Furukawa;Y. Hirakawa;E. Hoashi;S. Yoshihashi;H. Horiike;E. Wakai
在国际聚变材料辐照设施 (IFMIF) 的工程验证和工程设计活动 (EVEDA) 项目的框架内，我们在专门指定的 IFMIF 条件下（目标速度为 10、15 和 20 m/s，真空压力为 10−3Pa，Li 温度为 250 °C）下测量了 EVEDA Li 测试回路中锂 (Li) 靶的表面速度场。在IFMIF的当前设计中，锂靶材的自由表面处于相对于锂沸腾而言最严酷的热负荷条件下。本研究的目的是测量这些 IFMIF 条件下的实际自由表面速度，以评估锂靶材的散热性能。测量结果（使用我们团队开发的表面波跟踪方法）显示，IFMIF 光束足迹周围的二维时间平均速度分布几乎是均匀的，并且接近横截面平均速度。速度分布的均匀性小于 1 m/s。测量和分析的光束中心表面速度的比较表明，分析准确预测了测量结果，误差在 3% 以内。最后，证实锂靶材在 IFMIF 中按照设计提供了足够的散热性能。
In the framework of the Engineering Validation and Engineering Design Activities (EVEDA) project of the International Fusion Materials Irradiation Facility (IFMIF), we measured surface velocity fields of a lithium (Li) target at the EVEDA Li test loop under specifically-designated IFMIF conditions (target speeds of 10, 15, and 20 m/s, vacuum pressure of 10−3Pa, and Li temperature of 250 °C). In the current design of the IFMIF, the free surface of the Li target is under a most severe heat load condition with respect to Li boiling. The objective of this study is to measure the actual free-surface velocity under these IFMIF conditions to evaluate the heat removal performance of the Li target. The measured results (using the surface-wave tracking method that our team developed) showed two-dimensional time-averaged velocity distributions around the IFMIF beam footprint being virtually uniform, and close to the cross-sectional average velocity. The uniformity of the velocity distributions was less than 1 m/s. The comparison between the measured and analyzed surface velocity at the beam center showed that the analysis accurately predicts the measurement results within a margin of 3%. Finally, it was confirmed that the Li target delivers adequate heat removal performance in the IFMIF as designed.