Design and thermal performance of an improved mechanically attached module for divertor plate of LHD
Design and thermal performance of an improved mechanically attached module for divertor plate of LHD
复制标题
铲运机偏滤板改进型机械连接模块的设计与热性能
DOI：
10.1016/j.fusengdes.2005.06.320
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
N. Noda
中科院分区：
文献类型：
--
作者：
Y. Kubota;S. Masuzaki;T. Morisaki;K. Tokunaga;N. Noda
一个机械连接的偏滤器模块与改进的性能已经开发和部分安装在大型螺旋装置（LHD）。新设计的优点是消除了装甲瓦表面上任何导致高Z杂质发射的金属螺栓。新的模块由一对等石墨和薄石墨板制成的装甲瓦组成，由两个不锈钢（SS）或TZM螺栓水平紧固SS冷却管。热量直接从瓷砖表面流向冷却管。以前的设计使用了铜散热器已被使用。新组件的稳态热通量测试高达1.2MW/m2，使用电子枪ACT没有任何问题，而前一个组件的允许热通量由于铜散热器的变形而被限制在0.3MW/m2以下。在高达0.5MW/m2的热通量测试期间，新模块的放气减少到约三分之一。在1 MW/m2的稳态热流密度下，对新组件进行了115次循环的热疲劳试验，没有出现任何故障。比较以前和新的模块的结构，热性能和放气。
A mechanically attached divertor module with improved performance has been developed and partially installed in the large helical device (LHD). The advantage of the new design is to eliminate any metal bolts on the armor tile surface which leads to high Z impurity emission. The new module consists of a couple of armor tiles made of iso-graphite and a thin graphite sheet, which are tightened by two stainless steel (SS) or TZM bolts horizontally sandwiching a SS cooling pipe. The heat flows directly from the tile surface to the cooling pipe. The previous design used a copper heat sink has been used. Steady heat flux tests up to 1.2MW/m2have been carried out for the new module without any trouble using a electron gun ACT while the allowable heat flux of the previous module was limited below 0.3MW/m2due to deformation of the copper heat sink. The outgassing from the new module during heat flux tests up to 0.5MW/m2is decreased to about one-third. Thermal fatigue test up to 115 cycles under a steady heat flux of 1MW/m2for the new module has been performed without any troubles. Comparisons between the previous and new modules for the structure, thermal performance, and outgassing are made.