Influence of nozzle structure and process parameters for 3D printing HTPB-based propellant

This paper studies the influence of nozzle structure and process parameters on the solid propellant 3D printing process, so as to better guide nozzle structure optimization and process improvement, and realize continuous extrusion and molding of solid propellant. Four characteristic parameters such...

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Bibliographic Details
Published in:Journal of physics. Conference series 2023-07, Vol.2557 (1), p.12005
Main Authors: Song, Shixiong, Ren, Quanbin, Shi, Jiawei, Shi, Hongbin
Format: Article
Language:English
Subjects:
Continuous extrusion
Extrusion molding
Extrusion rate
HTPB propellants
Nozzles
Optimization
Physics
Process parameters
Solid propellants
Three dimensional printing
Wall slip
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Summary:This paper studies the influence of nozzle structure and process parameters on the solid propellant 3D printing process, so as to better guide nozzle structure optimization and process improvement, and realize continuous extrusion and molding of solid propellant. Four characteristic parameters such as nozzle diameter, nozzle shrinkage angle, process temperature, and wall slip coefficient are selected, and the influence of these four parameters on the extrusion speed and pressure of solid propellant slurry in the nozzle is discussed by using the orthogonal test principle and ANSYS/POLYFLOW. The results show that the most significant factor affecting the outlet velocity uniformity index and outlet pressure is the wall slip coefficient, followed by the nozzle diameter, and the influence of temperature and contraction angle is small.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2557/1/012005