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首页> 外文期刊>International Journal of Heat and Mass Transfer >Characterization of time varying thermophysical property of a surface layer: Numerical feasibility for JET tokamak tiles
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Characterization of time varying thermophysical property of a surface layer: Numerical feasibility for JET tokamak tiles

机译：表层随时间变化的热物理性质的表征：JET托卡马克瓷砖的数值可行性

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摘要

The present paper deals with the thermal characterization of the Surface Carbon Layer (SCL) usually poorly attached to the Plasma Facing Component (PFC) inside the nuclear fusion machines (Tokamak). A nonlinear unsteady calculation combined with the Conjugate Gradient Method (CGM) and the adjoint state is achieved in order to characterize in situ the time variation of the thermal resistance R_(th) of a surface layer. A numerical feasibility is presented with a realistic virtual experiment design. The accuracy of the method is examined by using simulated exact and inexact infrared measurements obtained on the SCL surface. The advantages of applying the CGM with the adjoint state in the present study, are that no prior information is needed on the time variation and the initial guess of the unknown thermal resistance.
机译：本文研究了表面碳层（SCL）的热特性，该碳通常很少附着在核聚变机（Tokamak）内部的等离子体面对部件（PFC）上。通过结合共轭梯度法（CGM）和伴随状态，实现了非线性非稳态计算，以便就地表征表面层热阻R_（th）的时间变化。数值可行性与现实的虚拟实验设计一起提出。该方法的准确性通过使用在SCL表面获得的模拟精确和不精确的红外测量值进行检查。在本研究中，在伴生状态下应用CGM的优势在于，不需要有关时间变化和未知热阻的初始猜测的先验信息。

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