摘要
研究了叶片挤出机的叶片塑化单元内周期性熔体的速度场。选用Bird-Carreau黏度方程,应用POLYFLOW有限元软件模拟了聚丙烯在叶片塑化输运单元中的流动;通过对模拟速度场的分析,明确了叶片塑化输运单元中流体的速度分布规律和流动特性,并为叶片单元结构的改进提出了合理建议。模拟结果表明:叶片塑化输运单元中存在拉伸流动;物料在叶片单元内实现了互换流动。
The periodically melt velocity field of vane plasticizing unit in vane extruder was studied. Based on Bird-Carreau viscosity equation, the flow of polypropylene in the vane plasticized transport unit was simulated by using finite element software POLYFLOW; the fluid velocity distribution and flow characteristics in blade plasticizing convey unit were made clear through analysis of the simulation results of velocity field, and the reasonable suggestions were proposed to improve the structure of the vane unit. Simulation results show that the elongational flow exits in plasticizing convey unit, and the exchange flow of material realizes in the blade unit.
出处
《塑料科技》
CAS
北大核心
2014年第5期97-101,共5页
Plastics Science and Technology
基金
NSFC-广东省人民政府自然科学联合基金资助项目(U1201242)
高等学校博士学科点专项科研基金(20120172130004)
关键词
叶片挤出机
塑化输运单元
速度场
拉伸流动
数值模拟
Vane extruder
Plasticizing and conveying unit
Velocity field
Elongational flow
Numericalsimulation
