|Table of Contents|

Analysis on LOx/RP-1 thrust chamber injector for additive manufacturing(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2023年04期
Page:
60-67
Research Field:
目次
Publishing date:

Info

Title:
Analysis on LOx/RP-1 thrust chamber injector for additive manufacturing
Author(s):
XIONG Jian;  XIAO Hong;  LI Longfei;  LIU Zhaoyu
(Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)
Keywords:
additive manufacturing;  thrust chamber;  injector;  integrated design;  quality control;  reliability
PACS:
V434+.24
DOI:
-
Abstract:
In order to realize the engineering application of 3D printing technology for injector of liquid rocket engine, the 3D printed injector was studied from the aspects of scheme design, printing manufacture, quality control and test verification. Through integrated design and overall manufacturing, the number of injector parts is reduced from 16 to 1, and 21 welds are cancelled, which greatly improve the inherent reliability of the product. At the same time, the difficulty of the process is reduced, and the rapid verification and iteration of the design scheme can be achieved. The product quality is guaranteed through flow test and quality inspection. Based on this, quality control method of the full process is summarized. The hot test results show that the performance of the printed injector is comparable to that of the machined injector, the combustion efficiency is more than 95%, and the feasibility of the 3D printing technology of the complex structure injector of the liquid rocket engine is verified, which lays a foundation for the full 3D printing of the thrust chamber of the liquid rocket engine.

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