文献类型：期刊文献

英文题名：Numerical analysis and optimization of key parts in the stirred tank based on solid-liquid flow field

作者：Jiang, Hongwan Yuan, Sen Liu, Hao Li, Weiwei Zhou, Xiaorong

第一作者：Jiang, Hongwan

通信作者：Yuan, S[1]

机构：[1]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China;[2]Guizhou Univ, Coll Mech Engn, Guiyang, Peoples R China

第一机构：贵州理工学院机械工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China.|贵州理工学院机械工程学院;贵州理工学院;

年份：2022

卷号：105

期号：1

外文期刊名：SCIENCE PROGRESS

收录：;Scopus(收录号：2-s2.0-85122276797);WOS:【SCI-EXPANDED(收录号:WOS:000918673800016)】；

基金：This work is financially supported by National Natural Science Foundation of China (52005118), Science and Technology Plan Project of Guizhou Province (Grant No. QKHJC[2020]1Y234) and High-level Talents Research Initiation Fund of Guizhou Institute of Technology (2019066).

语种：英文

外文关键词：computational fluid dynamics; numerical analysis; mixing tank; solid-liquid suspension; critical suspension

摘要：In order to further improve the mixing performance of the mixing device, the structure of the agitator was optimized, and the effects of the diameter and pitch of the agitator on the solid-liquid suspension characteristics were analyzed by single factor method. Multiple reference frame (MRF), computational fluid dynamics, Euler multiphase flow model and standard K- epsilon turbulence model were used to investigate the effect of the height from the bottom of the agitator on the suspension characteristics of particles in the agitator was studied. The results show that reducing the height from the bottom of the agitator can promote the suspension of particles at the bottom of the tank, but too low height from the bottom will easily produce mixing dead zone at the bottom of the tank, and cause the accumulation of particles. Reducing the height of the agitator from the bottom will enlarge the clear liquid area of the flow field, cause uneven particle distribution and increase the stirring torque. With the increase of agitator diameter, the critical suspension speed of the flow field decrease, but the stirring power required by the flow field increase. Increasing the blade spacing in a certain range can promote the suspension of particles and make the distribution of particles in the flow field more uniform. Therefore, the mixing power and the uniformity of particle concentration distribution need to be considered together in order to make the mixing device more efficient and energy-saving.