为了改良3D 打印机喷嘴结构的挤出效果，探究曲线与锥形收缩对挤出效果的不同影响。通过研究柱塞 型3D 打印装置的喷嘴结构，借助计算流体动力学(computational fluid dynamics，CFD)技术提供各种数据和图像， 通过设计不同结构的喷嘴曲线，在Polyflow 软件的辅助下从压力、速度分布及挤出膨胀等角度进行对比研究。结果 表明，在喷头设计中可以采用收缩率较大的曲线流道以提高火药成型件的强度与精度。
In order to improve the extrusion effect of nozzle structure in 3D printer, investigate the different influences of the extrusion effect resulted from the shrink by the shapes of curve and cone. By researching the construction of nozzles in the 3D printer with plunger piston, using the CFD technology to provide statistics and images and designing different nozzle curves, compare the results from pressure, velocity distribution and expansion with the help of Polyflow. It turns out that using the curve-shaped flow channel with lager shrinking rate in the design of nozzles will improve the intensity and accuracy of the work piece made of gunpowder.
徐 阳.基于CFD 的含能材料3D 打印机喷嘴[J].,2019,38(06).复制