摘要
应用欧拉-欧拉双流体模型,考察了聚丙烯环管反应器中弯管处的流场特征。其中,采用颗粒动力学描述固相(颗粒相)黏度与压力,用多重参考坐标系模型描述轴流泵的转动。根据上述模型,模拟了环管反应器内液-固两相二次流现象,并分析了轴流泵对流场的影响。结果表明,环管反应器弯管部位存在明显的二次流现象,轴流泵会减弱流体的二次流现象。
A computational fluid dynamics mod- el based on the Eulerian - Eulerian two - fluid model was first adopted to describe the Steady - state liquid - solid two - phase flow at the bending position of a polypropylene loop reactor composing of loop and axial flow pump. Next, the particle kinetics was used to describe the viscosity and pressure of the solid phase,and a multiple reference frame mod- el was used to describe the axial flow pump. Accord- ingly,the model was used to study the second flowphenomenon of the liquid - solid flow in the polypro- pylene loop reactor and investigate the effect of tlae axial pump on the second flow. The results showed that an obvious second flow phenomenon could be observed in the polypropylene loop reactor, and the axial pump could weaken the above second flow phenomenon.
出处
《石化技术与应用》
CAS
2014年第3期199-203,共5页
Petrochemical Technology & Application
基金
化学工程联合国家重点实验室(清华大学)开放课题(项目编号:SKL-ChE-10 A 03)
国家自然科学基金资助项目(项目编号:21076171)
关键词
丙烯
聚丙烯
环管反应器
轴流泵
二次流现象
流体动力学
propylene
polypropylene
loop reac- tor
axial flow pump
the second flow phenomenon
computational fluid dynamics
