文献类型：期刊文献

英文题名：Optimization of impeller geometry for high-solid viscous fluids toward mixing intensification and self-cleaning

作者：Li, Guo[1];Yu, Qianqian[1];Li, Shen[1];Chu, Yuejian[1];Zhu, Huihao[1];Ma, Yulu[1];Wang, Yu[1];Xie, Linsheng[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：484

外文期刊名：POWDER TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001822229100001)】；

语种：英文

外文关键词：Impeller; Mixing; Viscous fluids; High-solid content; Self-cleaning

摘要：Efficient mixing of high-solid viscous fluids remains a critical challenge in manufacturing advanced materials, such as battery slurries. In this work, we designed a novel type of impeller element featuring fan-shaped primary blades integrated with specially configured rods (rectangular, triangular, and plow-shaped). The influence of the blade configuration, size and tilt angle was quantitatively characterized by dimensionless evaluation indicators. It was found that the 3 & times; impeller featuring fan-shaped auxiliary blades and plow-shaped rods had more advantages on chaotic mixing and power pumping due to wider axial sweeping scope and enhanced dragging capacity. A systematic evaluation combining computational fluid dynamics and visualized experiments was conducted on the twin-shaft horizontal mixer composed of impeller kneading and series combination to quantify their mixing and self-cleaning performance. The results showed that the 3 & times; impeller series mixer further expanded high-velocity and high-shear regions, achieving a 3.9% reduction in stagnant zones and an impressive 48.5% increase in average depolymerization energy density, indicating superior dispersion capability for viscous fluids. The proportional index for correlating simulation and experiment was proposed, showing that higher dragging capacity of 3 & times; impeller series mixer increased volume exchange of solid particles between radial and longitudinal region, as well as their auxiliary blades markedly enhanced particle dispersion efficiency in central region through synergistic kneading interactions with the stirring elements, thereby improving the distribution performance and achieving effective self-cleaning around barrel inwall, stirring blades and rotating rods. This work provides a practical and efficient solution for the energy-saving and sustainable processing of high-solid viscous materials.