Optimization of the Structural Design of Glycerin Spraying Chamber of KDF-M NWT Filter Rod Making-machine Based on Flow Field Analysis in Confined Space

This paper studies the fluid simulation in limit area using FLUENT with the goal of optimizing the structure of the confined space inside the glycerol triacetate spraying chamber in the slim-hollow rod making machine to reduce the incidence of defects and improve the quality of the finished product. First, three-dimensional models of the spraying chamber in each of the three volumetric configurations are created. Subsequently, the flow field zones with varied diameters and spraying pressure are extracted and replicated. At last, the machine experiments are conducted and the data are confirmed. The findings indicate that the ideal structure occurs when the spraying chamber's volume is medium-sized since this allows the particles to travel in all directions and have a more dispersed trajectory. Additionally, the filter rod has the fewest faults and the least variation in quality when the pressure is set at 10.3 bar.