Study On The Mixing Performance Of Twin-Rotor Mixer With Periodic Ratio

This article aims to study the mixing performance of twin-rotor mixer with periodic ratio. In this paper, at the beginning of this study experimental platform of twin-rotor mixer was built. And digital image processing method which was using to quantify mixing performance of mixer was established. We were analyze different parameter impact on mixing performance of twin-rotor mixer under partly filled situation using red master batch-PP/PP as material system. In addition, experimental result proved correctness of digital image processing method. Combined with study of experiment and numerical simulation, we were reveal mixing performance and mixing mechanism for twin-rotor mixer under filled situation. Additional, characteristics of the flow fluid of twin-rotor mixer with periodic ratio were studied by the finite element numerical simulation. Furthermore, effect parameters of periodic ratio---ratio variation amplitude and ratio variation period on characteristics of the flow fluid of mixer was studied. On this basis, mixing performance of twin-rotor mixer was researched by experiment in different situation of periodic ratio. Inertia was enhanced by increasing local density of the material system in acceleration changing situation. Therefore, the random motion of fluids was displayed in operating mode of periodic ratio. Before and after enhancing local inertia, mixing performance of twin-rotor mixer with periodic ratio was study through experiment.1. According to study of batch mixer, experimental platform of twin-rotor mixer was built. Based on distribution uniformity of tracer color, MATLAB applications were programmed. Then digital image processing method which was using to quantify mixing performance of mixer was established. Compared with mixing performance of red master batch-PP/PP system, we were analyze different parameter impact on mixing performance of twin-rotor mixer under partly filled situation. And experimental result proved correctness of digital image processing method.2.2D geometric model of twin-rotor mixer was established. Characteristics of the flow fluid of twin-rotor with periodic ratio were studied by the finite element numerical simulation. At moment, variation rule of the average shear stress, dissipated power, and rotor torque were analyzed under different situations of ratio variation amplitude and ratio variation period. Additional, the formula derivation method was used to analyze the transient change of rotor phase difference over time.3. Study on the mixing performance of twin-rotor mixer with periodic ratio. Influence of different situations of ratio variation amplitude and ratio variation period on mixing performance was exported through the experimental results of the red master batch-PP/PP system. Inertia was enhanced by increasing local density of the material system which included steel balls in acceleration changing situation. Therefore, the random motion of fluids was displayed in operating mode of periodic ratio. Before and after enhancing local inertia, mixing performance of twin-rotor mixer with periodic ratio was study through experiment.4. In order to further understand the working principle of twin-rotor mixer, combine with study results of experiment and finite element numerical simulation, mixing performance and mixing mechanism of this mixer was analyzed under different situations of rotate speed, relative rotation direction and phase difference of rotor.Study results could expands driven model of the batch mixer with twin-rotor, and enriching the mixture forms of materials. Meanwhile, a novel research theory about evaluating system of mixing performance was provided in this article.