基于CFX的同轴变速双螺杆挤出机三维流场分析

目的：分析物料在改良后的同轴变速优化双螺杆挤出机流道中的工作状态。方法：运用ANSYS/CFX模拟分析双螺杆挤出机流道数值，得到物料的运动情况，并与传统双螺杆进行对比,通过宏观压力场、宏观速度场、速度流线图、速度矢量图对比分析两种螺杆的性能。结果：同轴变速优化双螺杆的建压能力、混合性能明显优于传统双螺杆，通过中段的减速输送可有效延长物料运输时间。结论：新型优化双螺杆在保留传统双螺杆优势的情况下，额外提升了建压能力和混合性能。

Three-dimensional flow field analysis of coaxial variable speed twin-screw extruder based on CFX

Objective: This research aims to analyze the working condition of the material in the flow channel of the improved coaxial variable speed optimization twin-screw extruder. Methods: Used ANSYS/CFX to simulate and analyze the flow channel value, obtained the movement of the material, and compared it with the traditional screw twin screw. The performance of the two types of screws was compared and analyzed through the macro pressure field, macro speed field, velocity streamline diagram, and velocity vector diagram. Results: After the study, it was found that the pressure building capacity and mixing performance of the coaxial variable speed optimized twin screw were significantly better than that of the traditional twin screw, and the material transportation time could be effectively extended through the decelerated conveying in the middle section. Conclusion: The new optimized twin-screw, while retaining the advantages of the traditional twin-screw, additionally improves the pressure building capacity and mixing performance.