This study developed a new heat flux reconstruction code based on the dual reciprocity boundary element method for the International Thermonuclear Experimental Reactor (ITER) divertor infrared (IR) thermography system. To use divertor heat flux reconstruction in ITER, we modeled the boundary condition between the coolant pipe inner wall and the coolant based on the temperature-dependent heat transfer coefficient and also considered the temperature dependence of tungsten thermal properties. Using this reconstruction code, we evaluated the sensitivity of the input data errors, divertor coolant temperature, and surface temperature errors on the accuracy of heat flux reconstruction by using simplified heat flux profiles, which are spatially uniform on the top surface of the monoblocks. This heat flux reconstruction method demonstrated that highly accurate heat flux reconstruction can be achieved for high heat flux cases in ITER; however, further studies are needed for low heat flux reconstruction.

中文翻译：

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ITER偏滤器红外热成像热通量重建的误差估计

本研究为国际热核实验反应堆 (ITER) 偏滤器红外 (IR) 热成像系统开发了一种基于双互易边界元方法的新热通量重建代码。为了在 ITER 中使用偏滤器热通量重建，我们基于温度相关的传热系数模拟了冷却剂管道内壁和冷却剂之间的边界条件，并考虑了钨热性能的温度依赖性。使用此重建代码，我们通过使用简化的热通量剖面来评估输入数据误差、偏滤器冷却剂温度和表面温度误差对热通量重建精度的敏感性，这些剖面在整体块的顶面上在空间上是均匀的。这种热通量重建方法表明，对于 ITER 中的高热通量情况，可以实现高精度的热通量重建；然而，需要进一步研究低热通量重建。