测量了床内颗粒速度分布，考察了操作条件、体系结构等因素对流化床流动特性的影响。
Particle velocity distribution in the bed was measured to investigate the influence of manufacturing conditions and structure of the bed.
颗粒速度分布和气固流动特性分析显示，内部颗粒循环尺度是影响床内混合方式的重要因素。
Analysis of the particle velocity distribution and the gas-solid hydrodynamics indicate that the scale of inner particle circulation is crucial in determining the mixing pattern within the beds.
与传统提升管相比，环形截面提升管中颗粒速度分布的均匀性有所改善，其最高速度与最低速度之差变小。
The radial distribution of particle velocity is more uniform and the difference between the maximum velocity and the minimum velocity decreases in comparison with the conventional riser.
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