采用Fluent软件的欧拉粒子多相流模型、κ-ε湍流方程结合滑移网格运算法则（SG）,在分析稀纸浆的绝对压力云图、水的速度矢量图、纸浆纤维的体积分数的基础上,对高浓纸浆漂白塔塔底卸料系统的S型卸料器及其稀释区的流动特性进行了瞬态模拟.结果表明：该卸料器的几何形状有利于卸料,而且卸料均匀、彻底;转速、黏度、密度、颗粒直径对卸料效果都有影响,其中转速的影响最大;水的切向、径向、轴向速度分量与粒子图像速度仪（PIV）测量的数据相吻合,说明欧拉粒子多相流模型和SG技巧组合起来能够很好地描述和研究S型卸料器及其稀释区的流场.

Based on the standard κ-ε turbulence model in combination with both the granular Eulerian multiphase model and the sliding-grid（SG） technology in Fluent,the contour of absolute pressure,the vectors of water velocity and the volume fraction of pulp fibers were analyzed,and the instantaneous flow behaviors of the pulp in the dilution zone and the S-type discharger at the bottom of high-consistency pulp-bleaching tower were simulated.The results show that the discharger helps to achieve uniform and complete discharge due to its special shape,that the rotating speed,the viscosity,the density and the particle diameter all influence the discharging effect,especially the rotating speed,and that the simulated tangential,radial and axial velocities of water accord well with the data measured using a particle image velometer（PIV）,which means that the combination of granular Eulerian multiphase model and SG technology is effective in describing the flow fields in the discharger and its dilution zone.