Comparative Study on Extrusion 3D Printing of Solid Propellant Based on Plunger and Screw.

Extrusion-based 3D printing holds great potential for manufacturing solid propellants. Among the various methods, screw- and plunger-based extrusion are the most frequently reported techniques for propellant 3D printing, each employing different extrusion mechanisms. This paper compares the flow characteristics of these two methods through a combination of simulations and experiments.