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Experimental analysis of the cas-particales flow structure in the dilute zone of a circulation fluidized bed by image processing

机译：图像处理对循环流化床稀薄区cas-颗粒流动结构的实验分析

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This paper presents an experimental analysis of the two-phase flow structures in a circulating fluidized bed cold pilot. This study was conducted in the dilute zone of the riser with low solid recirculation rates using the Laser sheet technique associated to image processing and the phase Doppler particle sizing technique. The three-dimensional structure of the gas-particles flow was found to be characterized by particle aggregates and gas pockets propagating from the bottom to the top of the riser. A schematic description of the particle cluster formation based on time series images of the diphasic flow cross sections is proposed. Transversal dimensions of gas pockets were determined by image processing on horizontal cross section images for three fifferent solid size distributions. The aggregate and dilute behavior are showed up with the second technique.
机译：本文介绍了循环流化床冷试中两相流结构的实验分析。使用与图像处理相关的激光片技术和相位多普勒颗粒定径技术，在低固体再循环率的立管稀薄区域中进行了这项研究。发现气体颗粒流的三维结构的特征是颗粒聚集物和从立管的底部到顶部传播的气穴。提出了基于两相流横截面时间序列图像的粒子团簇形成的示意图。对于三个不同的固体尺寸分布，通过对水平横截面图像进行图像处理来确定气袋的横向尺寸。第二种技术显示了聚集和稀释行为。

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