A modified drag model for the power-law fluid-particle flow considering effects of rheological properties was proposed. At high particle concentrations (ε_s ≥ 0.2), based on the Ergun equation, the cross-sectional shape and the tortuosity of the pore channel are considered, and the apparent flow behavior index and consistency coefficient of the power-law fluid at the surface of the particles are corrected. At low particle concentrations (ε_s < 0.2), based on the Wen-Yu drag model, the modified Reynolds number for power-law fluid and the relational expression between drag coefficient for single particle and Reynolds number that considers the effect of the flow behavior index are adopted. Numerical simulations for the power-law fluid-particle flow in the fluidized bed were carried out using the non-Newtonian drag model. The effects of rheological parameters on the drag coefficient were analyzed. The comparisons of simulation and experiment show that the modified drag model predicts reasonable void fraction under different rheological parameters, particle diameters, and liquid velocities in both low particle concentrations and high particle concentrations. The increase in flow behavior index and consistency coefficient increases the drag coefficient between the two phases and decreases the average particle concentration within the bed.

提出了一种考虑流变特性影响的幂律流体流的改进阻力模型。在高粒子浓度（ε_小号 ≥0.2）的基础上，Ergun方程中，横截面形状和所述孔通道的曲折度被认为是，在表面上的幂律流体的表观流动行为指数和稠度系数的粒子被校正。在低颗粒浓度（ε_小号 <0.2），基于Wen-Yu阻力模型，采用修正后的幂律流体雷诺数以及考虑流动特性指标影响的单颗粒阻力系数与雷诺数之间的关系表达式。使用非牛顿阻力模型对流化床中幂律流体颗粒的流动进行了数值模拟。分析了流变参数对阻力系数的影响。仿真和实验的比较表明，改进的阻力模型可以在低颗粒浓度和高颗粒浓度下，在不同的流变参数，粒径和液体速度下，预测合理的空隙率。