双转子连续混炼机混沌型转子混合性能的研究

在提出一种新型混沌型转子结构的基础上，运用Polyflow软件对其混炼过程进行三维非牛顿等温模拟，并借助于粒子示踪法对物料所经历的流场特性进行统计学分析；分析了转子结构和工艺参数对转子混合性能的影响，同时通过共混改性实验，对转子的混合效果进行了评估和表征。结果表明，高混沌型转子的分布混合能力有较大的提高，同时保持着良好的分散混合能力；混沌型转子制备的复合材料力学性能优于经典转子；转子转速的提高可以增强混沌转子的分散及分布混合能力，适当的加料速率是保证取得较好混合效果的关键因素。

Study on Mixing Performance of Chaotic Rotors in Two-rotor Continuous Mixers

A chaotic mixing rotor was proposed, on which three-dimensional non-Newtonian isothermal flow field simulation was performed by means of Polyflow software to characterize the mixing performance in a two-rotor continuous mixer. The mixing process experienced by the material was statistically analyzed by particle tracking analysis (PTA) method. The influences of rotor structure and processing parameters on the mixing performance was also been discussed. Additional mixing experiments were conducted to evaluate and characterize the mixing performance of different rotor structures. It was found that the distributive mixing capability of high-chaos rotor was better than that of classical rotors, while the dispersive mixing capabilities of the two kinds of rotors were the same. The mechanical property of blends prepared by chaotic rotors was better than prepared by classic rotors. Both dispersive and distributive mixing capability would be promoted when the rotor speed increased. Besides, appropriate feed speed was also a key factor to achieve a good mixing performance.Key words：two-rotor continuous mixer; chaotic rotor; numerical simulation; mixing performance.