化工学报2023，Vol.74Issue(10)：4074-4086,13.DOI:10.11949/0438-1157.20230732
涡流空气分级流场中颗粒运动及分布规律研究
Study of particle motion and distribution laws in the turbo air classification flow field
摘要
Abstract
To probe into the separation process of coarse and fine particles in the classifiers,based on the particle-eddy interaction model and the discrete element soft sphere model,the influence of turbulent fluctuation in the turbo air classification flow field on particle motion and cut size d50 are investigated.The distribution laws of particles in the classification process are also explored.Turbulent fluctuation mainly influences the trajectory of small particles.It has little effect on the trajectory of large particles,and has no significant effect on cut size d50.At an inlet air velocity of 12 m·s-1 and a rotor cage rotating speed of 1200 r·min-1,for the radial distribution,the fine particles less than 20 μm are mainly distributed in the rotor cage area,particles with size near d50 move with swirling flow in the annular region,and the coarse particles larger than 25 μm gather in the area near the guide blade.Due to the interaction between particles,some fine particles may be mixed with the coarse particles,resulting in a"fish-hook effect".For the axial distribution,the fine particles less than 20 μm are mainly distributed in the classifier near the top area,the coarse particles gradually settle downward and the larger the particle size the faster the settlement.关键词
涡流空气分级机/湍流/颗粒分布/软球模型/计算流体力学/数值模拟Key words
turbo air classifier/turbulent flow/particle distribution/soft sphere model/computational fluid dynamics/numerical simulation分类
化学化工引用本文复制引用
于源,刘克润,李兴帅,刘家祥,焦志伟..涡流空气分级流场中颗粒运动及分布规律研究[J].化工学报,2023,74(10):4074-4086,13.基金项目
国家自然科学基金项目(52174234) （52174234）
