振动场作用下聚合物熔体在异型材挤出口模内的充填流动分析  

NUMERICAL SIMULATION AND ANALYSIS OF POLYMER MELT FILLING FLOW DRIVEN BY A PERIODICALLY OSCILLATING ENTRANCE PRESSURE THROUGH THE EXTRUSION DIE WITH AN IRREGULAR CROSS-SECTION

作　　者：柳和生[1] 吴晓[2] 李绅元[1] 罗忠民[1] 

机构地区：[1]南昌大学机电工程学院聚合物加工研究室,江西南昌330029 [2]武汉科技学院机电工程系,湖北武汉430074

出　　处：《高分子材料科学与工程》2005年第2期20-23,共4页Polymer Materials Science & Engineering

基　　金：江西省自然科学基金;国家自然科学基金资助项目(59763002)

摘　　要：利用ANSYS软件对受口模入口处周期性振动的压力驱动的非牛顿幂律聚合物熔体在"L"形异型材挤出口模内的充填流动进行了三维等温数值模拟,求得了压力和速度随时间和沿路径的变化曲线,并因此总结出了振动参数对充填流动的影响规律。结果表明,速度和压力的振动均沿挤出方向逐渐衰减,入口压力的低频高幅振动有利于充填过程的稳定。In this paper, the three dimensional isothermal numerical simulation was conducted by means of ANSYS software package for the Non-Newtonian power-law polymer melt flow driven by a periodically oscillating entrance pressure through the extrusion die with the L shaped cross section. The curves of velocity and pressure vs. time and along path were worked out, and then the effects of the oscillation parameters on the filling flow were outlined as that both velocity oscillations and pressure oscillation attenuate along the extrusion path, and the filling process becomes more stable at lower frequency or larger amplitude of the oscillation of the entrance pressure.

关 键 词：挤出 充填过程 数值模拟 异型材 ANSYS 振动 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]