【摘要】 在D300mm喷嘴式分布器射流流化床上利用双流体模型结合颗粒动力学理论对空隙率分布进行了模拟计算。模拟结果与实验结果吻合较好。在此基础上运用该模型预测了不同喷嘴仰角对床内空隙率分布的影响规律。预测结果表明,喷嘴仰角改变将会影响床层空隙率。更多还原

【Abstract】 In a D300?mm jetting fluidized bed with a three-nozzle distributor, the voidage distribution was simulated by two fluid model combined with kinetic theory of granular flow. It was found that the simulating results were in good agreement with the experimental data. Based on the model, the effects of various elevation angles on the voidage distribution in the fluidized bed were discussed. The results showed that the change of nozzle elevation angles would influence the voidage distribution in the fluidized bed.更多还原