Numerical optimization of tungsten monoblock tile in EAST divertor
Numerical optimization of tungsten monoblock tile in EAST divertor
复制标题
EAST 偏滤器中钨整体瓦的数值优化
DOI：
10.1016/j.fusengdes.2016.04.028
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发表时间：
2016-10
影响因子：
1.7
通讯作者：
Guojian Niu
中科院分区：
文献类型：
--
作者：
Xiahua Chen;Fang Ding;Hongmin Mao;Guangnan Luo;Zhenhu Hu;Feng Xu;Guojian Niu
2014年，在EAST安装了环形对称1mm × 1mm倒角的iter型钨分流器。在实验中，热斑主要分布在钨/铜单块单元两柱之间的柱面间隙处，并且由于安装不对中而加剧了热斑的分布。这些热点会显著降低W导流器的功率处理能力，需要加以缓解。建立了基于有限元法的瓷砖倒角设计数值优化模型，采用均匀表法设计数值实验。然后在ANSYS中对这些实验的计算结果进行处理，采用计算机实验设计与分析（DACE）规范，其中采用Kriging法重构响应面。最佳几何形状可由曲面上的最小点导出。结果表明，在平行热流密度为200 MW/m2、与瓦面倾角为3°的情况下，采用优化的单面倒角可将0.5 mm不对中W瓦的最高温度降低至2084℃，比1 mm × 1 mm对称倒角瓦的最高温度降低1.8倍。最佳倒角几何形状与等离子体磁通对瓷砖表面的倾斜角密切相关。因此，在一个扁平的盒式模块中的单块瓷砖需要进行不同的倒角，以适应不同的倾角。
The ITER-like tungsten divertor with toroidally symmetric 1 mm × 1 mm chamfers on monoblock tiles has been installed in EAST in 2014. Hot spots were experimentally observed mostly along the toridial facing gaps between two columns of W/Cu monoblock units, which are often aggravated by installation misalignment. These hot spots can significantly degrade the power handling capability of W divertor and need to be alleviated.A numerical optimization model for tile chamfering design is built based on the finite element method (FEM), in which the numerical experiments are designed by the uniform table. The calculation results in ANSYS for these experiments are then processed employing the code Design and Analysis of Computer Experiments (DACE) in which the Kriging method is adopted to reconstruct a response surface. The optimum geometry can be derived from the minimum point on the surface. The results show that, under 200 MW/m2parallel heat flux with an inclination angle of 3° with respect to tile surface, the maximum temperature on W tile with a 0.5 mm misalignment can be decreased to 2084 °C by adopting an optimized single-sided chamfer, 1.8 times lower than 1 mm × 1 mm symmetrically chamfered tile. The optimum chamfering geometry has a strong dependence on the inclination angle of plasma flux to tile surface. As a result, the monoblock tiles in a flat cassette module need to be chamfered differently to adapt to the varied inclination angles.
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影响因子：
0.8
作者：
Y. Ueda
通讯作者：
Y. Ueda
影响因子：
2.5
作者：
Simpson, TW;Mistree, F
通讯作者：
Mistree, F
影响因子：
2.5
作者：
Fang, KT;Lin, DKJ;Zhang, Y
通讯作者：
Zhang, Y
影响因子：
3.1
作者：
Pitts, R. A.;Carpentier, S.;Stangeby, P. C.
通讯作者：
Stangeby, P. C.
DOI：
10.1109/fusion.1995.534199
发表时间：
1995-09
期刊：
Proceedings of 16th International Symposium on Fusion Engineering
影响因子：
--
作者：
C. Baxi
通讯作者：
C. Baxi