Abstract A novel gas distributor fabricated with 3D printing was used in the present work to improve the radial distribution of particles in a circulating turbulent fluidized bed (CTFB). The effect of fractal distributor on a CTFB was studied using cold model tests and numerical simulations. At constant bed height and with other operating conditions, a higher particle concentration was obtained from the two-layer gas distributor, while the one-layer gas distributor produced a more even radial distribution. Additionally, based on the Eulerian/Eulerian method, a computational fluid dynamics (CFD) model incorporating a modified gas-solid drag model has been used to simulate the fluidized bed. Compared with a traditional drag force model, the modified model produced more accurate predictions (from a comparison of simulated and measured values) for the distribution of the gas and solid phases.

中文翻译：

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分形气体分布器对循环湍流流化床中颗粒径向分布的影响

摘要 在目前的工作中使用了一种用 3D 打印制造的新型气体分配器，以改善循环湍流流化床 (CTFB) 中颗粒的径向分布。使用冷模型试验和数值模拟研究了分形分布器对 CTFB 的影响。在恒定床层高度和其他操作条件下，两层气体分布器获得更高的颗粒浓度，而一层气体分布器产生更均匀的径向分布。此外，基于欧拉/欧拉方法，结合改进的气固阻力模型的计算流体动力学 (CFD) 模型已用于模拟流化床。与传统的阻力模型相比，