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A combined 2D inverse predictions and experimental analysis for the bank formation inside a metallurgical reactor

机译:冶金反应器内部堆积形成的二维逆预测与实验分析相结合

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摘要

This paper presents a comparison between direct measurements and inverse predictions of a molten salt bank formation inside an experimental setup representing a real metallurgical reactor. This new inverse method rests on a quasi-2D virtual approach based on the adjoint problem and on the conjugate gradient method. A specific small-scale experimental setup was designed to support experiments conducted with high temperature and corrosive molten salts. Non-intrusive temperature measurements were taken, by means of an infrared camera, to feed the inverse procedure. Direct measurements of the experimental solidification fronts were done to validate the inverse method. Usual difficulties faced in the implementation of the inverse method in a real case are highlighted. It was found that, under the experimental setup conditions, the inverse heat transfer method leads to accurate predictions of the time-varying shape of the molten salt bank, i.e., accuracy is below 5 mm (domain size: [0-35 mm]). Results indicate however that a direct measurement of the heat flux released by the crucible on the bottom boundary is imperative to guarantee the effectiveness of the inverse method.
机译:本文介绍了代表真实冶金反应堆的实验装置内部的熔融盐储层形成的直接测量结果和逆向预测结果之间的比较。这种新的逆方法基于基于伴随问题和共轭梯度法的准二维虚拟方法。设计了一种特定的小型实验装置来支持使用高温和腐蚀性熔融盐进行的实验。借助于红外摄像机进行非侵入式温度测量,以提供相反的过程。对实验凝固前沿进行直接测量以验证逆方法。强调了在实际情况下实施逆方法所面临的通常困难。已经发现,在实验设置条件下,逆传热方法可以准确预测熔盐堆的时变形状,即精度低于5毫米(畴尺寸:[0-35毫米]) 。但是结果表明,必须直接测量坩埚在底部边界释放的热通量,以确保反方法的有效性。

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