随动式动态混合器的混合性能

Studies on mixing performances of the servo dynamic mixer

介绍了随动式动态混合器的结构原理,采用截面直接拍摄法在光管和随动式动态混合器中进行了甘油-水两相混合实验,获得甘油的轴向分布图。此外,采用FLUENT中的Mixture多相流模型、RNG k-ε湍流模型进行了混合性能数值模拟研究,获得了甘油的浓度场云图及混合不均匀系数。数值模拟与实验所得甘油在光管中的流动状态具有很好地一致性,证明了模拟方法的可靠性。研究结果表明,随动式动态混合器对分散相具有"分割-分隔、扰流、摩擦-混合"的作用,模拟所得甘油沿流动方向不均匀系数的变化,表明了随动式动态混合器具有较好的混合性能。

This paper introduced the structural principle of the servo dynamic mixer. The images of the distribution of dispersion phase of glycerol on the axial cross section in the plane tube and in the servo dynamic mixer were obtained by photographic technique. Mixture multiphase model and RNG k-ε model were chosen in CFD modeling to obtain the cloud chart of the distribution phase and the variation coefficient of glycerol. The results of the distribution of glycerol in the plane tube obtained in the experimental study and numerical modeling agreed well with each other, proving the rationality of the numerical modeling. The experimental results showed that the servo dynamic mixer had an effect of partition-segregation, disturbance, and friction-blend on the dispersed phase. The variation coefficient of glycerol obtained by the way of CFD modeling showed that the servo dynamic mixer had excellent performance on mixing.