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基于欧拉-欧拉双流体模型,数值模拟研究了底部均匀布风鼓泡流化床内气固两相流体动力特性。鼓泡床底部分别采用均匀进风和脉动项按正态分布的脉动进风速度边界条件,分别考察了不同进口边界条件对鼓泡床内气固两相流体动力特性的影响。模拟结果显示,采用脉动项按正态分布的脉动进风速度边界条件时,气体能够充分地与固体颗粒发生相互作用,表明在数值模拟中边界条件设置时考虑速度脉动可以更合理地预测床内气固两相流动特性。
Based on the Euler-Euler dual-fluid model, the dynamic characteristics of gas-solid two-phase flow in a uniformly distributed bubbling fluidized bed at the bottom were numerically simulated. Under the bubbling bed bottom, the normal inlet and outlet velocities of the inlet and outlet are respectively used to investigate the influence of different inlet boundary conditions on the dynamic characteristics of the gas-solid two-phase fluid in the bubble column. The simulation results show that the gas can fully interact with the solid particles when the pulsation term is normally distributed with the pulsating inlet velocity boundary conditions, which indicates that the velocity of the pulsation can be more reasonably predicted in the numerical simulation when the boundary conditions are set Gas-solid two-phase flow characteristics.