论文标题
外部磁场中液体壳中氩气泡流动的动态中子成像
Dynamic neutron imaging of argon bubble flow in liquid gallium in external magnetic field
论文作者
论文摘要
本文介绍了矩形液体镀与有或不应用外部水平磁场的氩气泡流中的中子成像的详细结果。提出了开发的图像处理算法，并证明了其从低信噪比图像中提取物理信息的能力。计算和分析了气泡参数，速度成分，轨迹和相关统计。该代码的更简单版本应用于重现实验的计算流体动力学模拟的输出。这项工作将进一步验证中子X射线照相作为监测液体金属中气泡流量的合适方法，以及概述程序，这些程序可能会帮助其他人从中子X射线照相图像中提取数据，而中子放射线照相图像具有低信噪比的比率，这是由于高框架速率摄取而导致的高框架速率摄取所需的高框架速率，以解决快速气泡运动。
This paper presents detailed results of neutron imaging of argon bubble flows in a rectangular liquid gallium vessel with and without the application of external horizontal magnetic field. The developed image processing algorithm is presented and its capability to extract physical information from images of low signal-to-noise ratio is demonstrated. Bubble parameters, velocity components, trajectories and relevant statistics were computed and analysed. A simpler version of the code was applied to the output of computational fluid dynamics simulations that reproduced the experiment. This work serves to further validate the neutron radiography as a suitable method for monitoring gas bubble flow in liquid metals, as well as to outline procedures that might help others to extract data from neutron radiography images with a low signal-to-noise ratio resulting from high frame rate acquisitions required to resolve rapid bubble motion.
