搅拌釜内高固含率搅拌功率的实验测量及模拟预测

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中图分类号：TQ027.2 文献标志码：A DOI：10.3969/j.issn.1003-9015.2025.01.007

文章编号：1003-9015（2025）01-0054-10

Abstract：Inorder to improve theaccuracy of power predictions of solid-liquid stirrd tanks under high solid volumefraction conditions，effectsof solidvolume fraction andshearrateontheglycerol-polymethyl methacrylate（PMMA）solid-liquid two-phase system were investigated bya rheometer.A new viscositymodel of solid-liquid two-phase system was proposed based on experimental results.A CFD model coupled with the proposed model was used to studythe stiring powerof solid-liquid stired tank at high solid volume fractions （O.1-O.4）.The results indicate thatwith the increase of solid volume fraction （especialloverO.2），thesolid-liquid two-phasesystem shows non-Newtonian fluid characteristics.The stirred power predicted by CFD simulations coupled with the viscosity of solid-liquid two-phase system derived from the kinetic theory of granular flows （KTGF）are found to be negatively proportional to thesolid phase volume fraction，which is inconsistent withthe experimental findings.The CFD simulation combined with the proposed model significantly improves the prediction accuracyof solid-liquid mixing power in stirred tank under high solid volume fraction，and the simulation of solid phase distribution shows good consistency with the experimental results.

Key words： stired tank；high solid volume fraction；viscosity of solid-liquid two-phase system；CFD；stirring power

1前言

在搅拌反应器的工程设计和运行调控过程中，反应器搅拌功率的准确预测是一个较为重要的因素[1]。（剩余13361字）