摘要
內锥旋流器(ICH)是一种锥段结构倒置的新型旋流器,目前主要用于液-液的相分离。为了探索用ICH进行颗粒分级的可行性,通过雷诺应力湍流模型与Eulerian双流体模型耦合(RSM+TFM),构建ICH和常规旋流器的气-液-固三相流场,从流场压降、速度分布、颗粒运动行为以及分离效率4个方面进行对比分析。模型有效性的验证结果显示:文中构建的CFD数值模型与相关的实验结果吻合度较高,对切向速度、轴向速度以及分离效率的预测可靠。研究结果表明:与常规旋流器相比,ICH的流场压降更低,有利于减少分离作业的能耗,但也导致其离心力场强度处于较低水平;另一方面,ICH对粗颗粒的分离效果较好,溢流输出的细化产物质量较高,而对细颗粒的回收能力较差,底流流失的细颗粒数量较多。
Inner cone hydrocyclone(ICH) is a new type of hydrocyclone with a reversed inner cone structure mainly used in liquid-liquid separation at present. To investigate the feasibility of ICH for particle classification, Rey-nolds stress turbulence model and Eulerian two-fluid model(RSM+TFM) were coupled to construct the flow field with gas-liquid-solid phase of ICH and conventional hydrocyclone. The comparative analysis was conducted from the aspects of pressure drop, velocity distribution, particle motion behavior, and separation efficiency. Model validation result shows that the CFD numerical model constructed in this study is consistent with relevant experiment result, and that its prediction on tangential velocity, axial velocity, separation efficiency is reliable. The simulation results indicates that, compared with conventional hydrocyclone, ICH has a lower pressure drop, which can help to reduce the energy consumption of the separation operation, but also leads to a weaker centrifugal force field. In addition, ICH has a better separation effect on coarse particles, and the refined production from the over flow is of higher quality. However, the recovery ability of ICH for fine particles is poor, which results in a larger fine particle loss from the underflow.
作者
应锐
蒋劲
李燕辉
王玉成
YING Rui;JIANG Jin;LI Yanhui;WANG Yucheng(MOE Key Laboratory of Transients in Hydraulic Machinery,Wuhan University,Wuhan 430072,Hubei,China)
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第4期95-103,共9页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51279145)。
关键词
內锥旋流器
流场特性
计算流体动力学
多相流
数值模拟
颗粒分级
inner cone hydrocyclone
flow field characteristics
computational fluid dynamics
multi-phase flow
numerical simulation
particle classification
作者简介
应锐(1989-),男,博士生,主要从事流体机械、两相流研究。E-mail:yrfhtd@126.com;通信作者:蒋劲(1963-),男,教授,博士生导师,主要从事计算流体动力学、瞬变流研究。E-mail:jiangjing423@163.com。
