摘要
为提升搅拌过程中混合效率,提出一种错位穿流桨并基于计算流体动力学(CFD)建立其流场模型。研究错位穿流桨安装位置和穿孔对流场的影响,对比不同工况下流场变化,明确错位穿流桨工况;探究错位穿流桨上穿孔分布与功率的相互关系,通过多元线性回归分析确定穿孔位置;以混合效率作为桨叶混合能力的评价指标,分析错位穿流桨、错位桨和Rushton桨的混合效率,发现错位穿流桨有着较强的混合能力。结果表明:错位穿流桨结构简单,功率消耗低,能够减少混合时间,穿孔均匀分布在桨叶上,有效发挥穿流效果,混合效率相较于Rushton桨提升32%,研究结果可为反应器设计提供一种更高效节能的搅拌器选择。
To improve the mixing efficiency in the mixing process,we propose a type of dislocated-punched impeller and build a flow field model based on computational fluid dynamics(CFD).The effects of the installation position and punched hole of the dislocated-punched impeller on the flow field are studied,the changes of the flow field under different working conditions are compared,and the working conditions of the dislocated-punched impeller are clarified.The relationship between the perforation distribution and power on the dislocated-punched impeller is explored and multiple linear regression analysis is employed to determine the punched location.Taking the mixing efficiency as the evaluation index of the mixing capacity of the impellers,the mixing efficiency of the dislocated-punched impeller,the dislocated-bladed impeller and the Rushton impeller is compared and analyzed.It is found that the dislocated-punched impeller has a strong mixing capacity.Moreover,the dislocated-punched impeller has a simple structure and lower power requirements,reducing the mixing time.The punched-hole should be evenly distributed on the impeller blades as much as possible in order to effectively exert the punched hole effect.The mixing efficiency is improved by 32%compared to Rushton paddle.Our research may provide another agitator choice with a better mixing efficiency and a higher energy efficiency for reactor design.
作者
伍熙
姜帅
杜玮
陈伟
李红军
WU Xi;JIANG Shuai;DU Wei;CHEN Wei;LI Hongjun(School of Mechanical Engineering and Automation,Wuhan Textile University,Wuhan 430200,China;Hubei Engineering Research Center of Industrial Detonator Intelligent Assembly,Wuhan 430200,China;Chongqing Academy of Metrology and Quality Inspection,Chongqing 401120,China;School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,China)
出处
《重庆理工大学学报(自然科学)》
北大核心
2025年第2期195-201,共7页
Journal of Chongqing University of Technology:Natural Science
基金
国家自然科学基金青年科学基金项目(52108221)
冶金装备及其控制教育部重点实验室开放基金项目(MEC0F2022B05)。
关键词
错位穿流桨
流场
混合效率
CFD
多元线性回归
dislocated-punched Rushton impeller
flow field
mixing efficiency
CFD
multiple linear regression
