摘 要： 基于欧拉两相流模型计算循环流化床底部区域的流动特性。 在低气速（1.0～2.5 m/s）、低循环量下（5.2～34.5 kg/(m²·s)），模拟时黏 性采用层流模型取得了较好的效果。实验采用光导纤维探头测量仪测 量流化床底部区域 3 个截面的局部颗粒浓度，模拟计算了循环流化床 底部 3 个截面的颗粒浓度的径向分布，并同循环流化床装置的实验数 据进行了对比。 结果表明，数值模拟计算与实验结果相吻合。

关键词：循环流化床；流动特性；数值模拟

Abstract: Euler two-phase model was used to compute the flow charac teristics in the bed bottom of a circulating fluidized bed. At the low gas velocity(1.0～2.5 m/s) and the low solids mass flux(5.2～34.5 kg/(m²·s))， the laminar model was suitable for simulation local particle concentra tion. The local solid concentrations of three cross-sections at circulating fluidize bed bottom region were measured by an optical fiber probe. The predicted radial concentration distributions by numerical simulation were in agreement with the experiment data from a circulating fluidized bed. 

Keywords: circulating fluidized bed； flow characteristic； numerical simulation