摘要
针对旋风分离器内部流场的研究,采用数值模拟的方法模拟了分离器内固体颗粒的运动轨迹。通过分析不同粒径及入口速度对旋风分离器内固相颗粒运动轨迹的影响,探索了颗粒在旋风分离器中运动的物理机理,随后对旋风分离器的灰斗长度进行了优化。结果表明:颗粒在旋风分离器中运动轨迹比较复杂,且同时受到入口速度和粒子半径的影响,相同粒径颗粒在不同入口速度下运动轨迹不同,且小粒径颗粒较容易受到入口速度的影响,旋风分离器在"标准"灰斗长度下的分离效率及分离性能最好。模拟结果可为工程实际应用提供一定的理论指导。
Numerical simulation method is used to simulate the movement track of the solid particles in a cyclone for the study of cyclone separator flow field.We adopt the discrete phase model（DPM） for solid field.The physical mechanism for the particles movement in a cyclone separator is explored by analyzing the influence of different particle size and inlet velocity on solid particles track in a cyclone separator.Then the length of cyclone hopper was optimized.The results show that the particles＇ track in a cyclone separator is complex,and it is influenced by inlet velocity and particles size at the same time.The track of same size particles is different at the case of different inlet velocity,and small particles are easier influenced by the inlet velocity.The separation efficiency and separation performance of the cyclone in ＂standard＂ hopper length is best.The simulation results could provide some theoretical guide for engineering applications.
出处
《流体机械》
CSCD
北大核心
2011年第9期21-25,共5页
Fluid Machinery
关键词
旋风分离器
数值模拟
粒径
轨迹
cyclone separator
numerical simulation
particle size
track
