Abstract Fluidization characteristics of wide-size-distribution particles in the gas-solid fluidized bed reactor are investigated by applying experiment and computational fluid dynamics (CFD) methods. In this study, three types of narrow-cut particles and two sets of wide-size-distribution particles are used. A model considering particle size distribution is developed in the Eulerian frame, and good agreement between numerical results and experimental data is observed. The particle size distribution has an important effect on the average bed voidage. The axial particle diameter profiles along bed height have a “S” type feature. Minimum fluidization velocity is determined from the standard deviation of pressure fluctuations and bubble dynamics are analyzed based on power spectra. Results indicate that fine particle composition can reduce the minimum fluidization velocity of wide-size-distribution particle system and the bubble diameter in the fluidized bed.

中文翻译：

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宽粒径分布颗粒在气固流化床反应器中的流化特性

摘要 应用实验和计算流体动力学（CFD）方法研究了宽粒径分布颗粒在气固流化床反应器中的流化特性。在这项研究中，使用了三种窄切颗粒和两组宽尺寸分布的颗粒。在欧拉框架中建立了考虑粒度分布的模型，观察到数值结果与实验数据之间的良好一致性。粒度分布对平均床空隙率有重要影响。沿床高的轴向粒径分布具有“S”型特征。根据压力波动的标准偏差确定最小流化速度，并基于功率谱分析气泡动力学。