|Table of Contents|

Injector flow distribution method of a hydroxylamine nitrate thruster(PDF)

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

Issue:
2023年05期
Page:
99-106
Research Field:
目次
Publishing date:

Info

Title:
Injector flow distribution method of a hydroxylamine nitrate thruster
Author(s):
BAI Meishan1; 2;  YU Xiqiao1; 2;  LU Wenjie1;  YAO Tianliang1; 2;  LI Sen1;  HAN Chong1; 2;  QIU Xin1; 2
(1.Shanghai Institute of Space Propulsion, Shanghai 201112, China; 2. Shanghai Engineering Research Center of Space Engine, Shanghai 201112, China)
Keywords:
non-toxic HAN thruster;  injector;  flow distribution;  theory of design;  long life-time
PACS:
V434.24
DOI:
-
Abstract:
If the traditional hydrazine-type uniformly distributed injector was used in a hydroxylammonium nitrate(HAN)thruster, the temperature in the center of the catalyst bed near the injector is lower than the temperature on the edge, and the conversion rate of the reactants in the center is lower than that on the edge, and the reactant mass fraction in the center is higher than that on the edge, which will affect the operating life of the thruster. Aiming at the problem that the center of the catalyst bed is easy to overload by using the traditional scheme of the injector in the HAN thruster, a design method of the injector's flow distribution named “dense outside and sparse inside” was proposed, and the design theory of this method was given. Firing tests of a 60 N HAN thruster with a traditional injector and a new-type of injector were carried out. The results show that the 60 N HAN thruster with the traditional uniformly distributed injector fails after working for 680 s, while the thruster with the new special flow distribution injector can work steadily for 1 200 s. The new injector design method provided a reference for the engineering applications of the long-life HAN thruster.

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