Measurement of Liquid Distributions in Particle Packings Using Wire-Mesh Sensor versus Transmission Tomographic Imaging
Measurement of Liquid Distributions in Particle Packings Using Wire-Mesh Sensor versus Transmission Tomographic Imaging
复制标题
使用线网传感器与透射断层扫描成像测量颗粒填料中的液体分布
DOI：
10.1021/ie100900g
复制
发表时间：
2010
影响因子：
4.2
通讯作者：
U. Hampel
中科院分区：
文献类型：
--
作者：
A. Bieberle;M. Schubert;M. J. Silva;U. Hampel
本文比较了两种不同的成像技术在实验室填充床反应器中不同静止状态和两种不同颗粒填料下的流体动力学研究。该钢丝网传感器提供了10000帧/S的超高速横截面含液率分布成像和6 mm的良好空间分辨率。因此，对于瞬变和周期性流动情况，它是一种非常有用的成像工具。到目前为止，还没有人分析过它对填充床内流动的影响。γ-射线计算机层析成像使用662keVγ光子来获得横截面相位分布图像。它还提供了2 mm的良好空间分辨率，不会影响流量，但需要相当长的扫描时间。作为一种非侵入性技术，γ-射线层析成像已被用作评估丝网传感器测量的参考模式。使用不同的分析模型对两种成像模式的数据进行了比较，显示出良好的一致性。对于……上的铁丝网传感器。
The paper compares two different imaging techniques for the investigation of the hydrodynamics in a laboratory packed bed reactor operating at different stationary states and with two different particle packings. The wire-mesh sensor offers cross-sectional liquid holdup distribution imaging at an ultra high speed of 10000 frames/s and good spatial resolution of 6 mm. It is therefore a very useful imaging tool for transient and periodic flow conditions. Up to now its influence on the flow in a packed bed was never analyzed. γ-ray computed tomography uses 662 keV γ photons to obtain cross-sectional phase distribution images. It offers as well a good spatial resolution of 2 mm and does not influence the flow but needs rather long scanning times. As a noninvasive technique γ-ray tomography has been used as a reference modality to evaluate the wire-mesh sensor measurements. Data from both imaging modalities are compared utilizing different analyzing models and showed good agreement. For the wire-mesh sensor on...