场协同螺杆熔融段的熔融过程及场协同分析  

Melting Process and Field Synergy Analysis of Melting Section of Synergy Screw

作　　者：谭伟华[1] 鉴冉冉 关昌峰[1] 谢鹏程[1] 杨卫民[1] TAN Wei-hua;JIAN Ran-ran;GUAN Chang-feng;XIE Peng-cheng;YANG Wei-min(College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China)

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《塑料工业》2018年第11期51-56,共6页China Plastics Industry

基　　金：国家自然科学基金资助项目(51576012)

摘　　要：通过数值模拟的分析手段,对比了聚丙烯(PP)在场协同螺杆与普通螺杆熔融段的熔融过程,并运用场协同原理进行分析,从而揭示了场协同螺杆熔融段的流动传热特性及其机理。模拟结果表明,场协同螺杆在扭转元件放置处实现了对物料的径向翻转,增强了对流传热,加快了物料在螺杆熔融段的塑化进程,并且获得了更加均匀的温度场分布;同时其协同角比普通螺杆小,因此具有更好的速度场和温度梯度场的协同性。场协同原理的理论结果与流动传热模拟直接得到结果相吻合,该原理很好地解释了高黏度非牛顿流体的强化传热机理。According to the numerical simulation, differences of PP melting process between melting section of field synergy screw and general screw were compared and analyzed by the field synergy principle. The flow and heat transfer characteristics of field synergy screw, as well as the mechanism, were revealed. The results show that radial displacement of material is realized, where the torsion element is replaced. So the convection heat transfer is enhanced and plasticizing process in melting section of field synergy screw is accelerated. A more uniform temperature field distribution is obtained at the same time. Synergy angle of field synergy screw is lower than that of general screw, therefore velocity field and temperature gradient field has better synergy. The results of field synergy theory are consistent with that directly obtained from flow and heat transfer simulation, so the heat transfer mechanism of high viscosity non-Newtonian fluids could be explained well by field synergy principle.

关 键 词：数值模拟 场协同螺杆 扭转元件 径向翻转 对流传热 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]