Evaluation of heat transfer by sublimation for the application to the divertor heat sink for high fusion energy conversion
Evaluation of heat transfer by sublimation for the application to the divertor heat sink for high fusion energy conversion
复制标题
评估升华传热在偏滤器散热器中的应用，以实现高聚变能量转换
DOI：
10.1016/j.fusengdes.2014.03.041
复制
发表时间：
2014
影响因子：
1.7
通讯作者：
Satoshi Konishi
中科院分区：
文献类型：
--
作者：
Hyoseong Gwon;Yuto Takeuchi;Ryuta Kasada;Satoshi Konishi
采用有限元法对导流靶的热响应和结构响应进行了分析。在钨装甲上模拟了100 MW/m2水平的高热流密度，得到了表面温度分布。当施加大于100 MW/m2的动态热负荷时，钨的最高表面温度超过1300℃，无论其下的传热情况如何，都引起钨的再结晶。利用实验结果对钨进行了动态热负荷试验，评价了钨在动态热负荷下的材料性能。本研究还提出了分流式散热器的新概念，该散热器可以分配高热流密度并将热量传递给高温介质。它由钨装甲、高导热纤维增强复合材料和相变传热系统组成。将高热流密度模拟ELMs应用于导流器靶表面，对钨和复合材料的温度梯度、热应力进行了评价。根据分析结果，考虑了热结构要求。
Thermal and structural responses of divertor target were evaluated by using finite element method. High heat flux simulating ELMs at the level of 100 MW/m2was assumed onto the tungsten armor, and surface temperature profile was obtained. When dynamic heat load over 100 MW/m2was applied, the maximum surface temperature exceeded 1300 °C, and it caused recrystallization of tungsten regardless of the heat transfer below it. The result was used to conduct dynamic heat load experiment on tungsten, and material behavior of tungsten was evaluated under dynamic heat load. This study also proposed new concept of divertor heat sink which can distribute high heat flux and transfers the heat to high temperature medium. It consists of tungsten armor, composite enhanced with high thermal conductivity fiber, and heat transport system applying phase transition. High heat flux simulating ELMs was also applied to target surface of the divertor, temperature gradient, thermal stress of tungsten and composite were evaluated. Based on the results of analysis, thermal structural requirement was considered.