Flow Mechanism and Mixing Efficiency of a Parallel Arranged Triple Screw Extruder for Polymer Processing
Flow Mechanism and Mixing Efficiency of a Parallel Arranged Triple Screw Extruder for Polymer Processing
复制标题
聚合物加工用并联三螺杆挤出机的流动机理和混合效率
DOI：
10.1166/asem.2013.1225
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
L. Chen
中科院分区：
文献类型：
--
作者：
X. Z. Zhu;G. Wang;Y. D. He;L. Chen
平行排列三螺杆挤出机（PATSE）是近年来国内首次提出并制造的一种新型聚合物加工设备。与传统挤出设备相比，双螺杆挤出机比双螺杆挤出机多了一个啮合区域。为了更深入地了解PATSE的流动和混合机制，利用计算流体力学（CFD）软件Polyflow，结合carau - bird流体模型，建立了PATSE的二维有限元模型，计算了速度剖面。在速度场的基础上，利用粒子轨迹技术生成粒子轨迹来描述气流运动。计算了膏体的最大剪切速率和最大拉伸速率、偏析尺度、拉伸长度和混合效率等评价混合效率的参数，并与TSE进行了比较。结果表明，在截面上，与传统的TSE相比，PATSE具有更好的混合效率。
The parallel arranged tri-screw extruder (PATSE) is a new equipment for polymer processing, which was first proposed and manufactured in recent years in China. Comparison with the traditional extrusion equipments, a PATSE has one more intermeshing region than a twin screw extruder (TSE). In order to gain a more insight into the flow and mixing mechanisms of the PATSE, a 2D finite element model of the PATSE was established by using the computational fluid dynamics (CFD) codes, Polyflow, with a Carreau-Bird fluid model to calculate the velocity profiles. Based on the velocity fields, the particle trajectories were generated to describe the flow motions in the PATSE with the particle trajectories technology. And then many parameters of evaluation the mixing efficiency, such as the maximal shear rate and stretching rate, segregation scale, length of stretch and mixing efficiency of the PASTE were calculated and compared with those of the TSE. The results show that the PATSE has better mixing efficiency than the traditional TSE in the cross section.