文献类型：期刊文献

中文题名：单螺杆挤出机中停留时间分布的数值模拟

英文题名：Numerical Simulation of Residence Time Distribution in Single Screw Extruders

作者：宗原[1];戴干策[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2011

卷号：37

期号：6

起止页码：673

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：停留时间分布;有限元模拟;单螺杆挤出机

外文关键词：residence time distribution FEM single-screw extruder

摘要：将单螺杆挤出机简化为三维方腔,利用粒子轨迹跟踪技术和有限元法研究了螺杆转速和物料弹性对挤出机内停留时间分布的影响;同时,利用"完整模型"拟合了实验数据,分别定量表征了流道中活塞流、全混流和死区所占的体积分数。结果表明,聚合物在螺槽中的运动以活塞流为主,并存在全混流和死区,全混流与死区之间存在混合;物料的流变性质和操作条件的改变对其流动形式有影响。
The single-screw extruders is simplified as a 3D rectangle cavity. In order to investigate the effect of the screw speed and material elastic property on residence time distribution, the flow field is simulated by means of finite element method （FEM） and particle tracing technology. Meanwhile, the ＂complete model＂ is employed to fit the experimental data, and the volume fraction of plug flow, mixing flow and dead region are quantitatively characterized. The results show that the flow pattern in the screw channel is dominated by plug flow while includes CSTR, dead region and their mixture. The flow pattern is affected by the rheological behavior of the materials and operating conditions.