化工学报2025，Vol.76Issue(6)：2569-2579,11.DOI:10.11949/0438-1157.20241257
分形穿流桨搅拌槽内假塑性流体的混合行为
Mixing behavior of pseudoplastic fluid in a fractal perforated impeller stirred tank
摘要
Abstract
In order to increase the cave area,reduce the stagnant area,and improve the mixing efficiency of pseudoplastic fluid,the fractal theory is applied to the perforation design of the impeller,and a fractal perforated impeller is proposed to enhance the mixing behavior of pseudoplastic fluid.The mixing behavior of pseudoplastic fluid in a fractal perforated impeller stirred tank was investigated by combining experiment and computational fluid dynamics.The results showed that the power consumption and power number of FPT impeller system were lower than those of RT system,but the power consumption and power number increased with the increase of fractal iteration number of perforated holes at the same Reynolds number.Under the same power consumption,FPT impeller can enhance the shear effect on the fluid,increase the shear strain rate,increase the fluidity of the fluid,shorten the dimensionless mixing time,enlarge the cavern area,reduce the stagnation area and enhance the fluid chaotic mixing degree compared with RT impeller.Among them,the dimensionless mixing time of FPT-1 impeller system is shortened by 2.88％—5.65％,the cave area is increased by 6.58％,and the dimensionless mixing time of FPT-2 impeller system is shortened by 8.04％—11.00％,and the cave area is increased by 8.25％.Compared with conventional matrix perforation,fractal-arranged perforation was more advantageous in enhancing fluid mixing effect and improving fluid mixing efficiency.关键词
分形穿流搅拌桨/混合/假塑性流体/计算流体力学Key words
fractal perforated impeller/mixing/pseudoplastic fluid/computational fluid dynamics分类
化学化工引用本文复制引用
谷德银,杨豪,李昌树,刘作华..分形穿流桨搅拌槽内假塑性流体的混合行为[J].化工学报,2025,76(6):2569-2579,11.基金项目
国家自然科学基金项目(22208037) （22208037）
重庆市教委科学技术研究计划项目(KJQN202200805) （KJQN202200805）
