|Table of Contents|

Start-up filling process and heat transfer characteristics of shutdown in attitude and orbit control engine(PDF)

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

Issue:
2022年04期
Page:
43-50
Research Field:
目次
Publishing date:

Info

Title:
Start-up filling process and heat transfer characteristics of shutdown in attitude and orbit control engine
Author(s):
HUANG Jian;  LIN Qingguo
(Shanghai Engineering Research Center of Space Engine, Shanghai Institute of Space Propulsion, Shanghai 201112, China)
Keywords:
attitude and orbit control engine start-up and shutdown flow characteristics heat transfer characteristics simulation analysis experimental study
PACS:
V434.3
DOI:
-
Abstract:
In order to improve the response speed and safety reliability of the bipropellant attitude and orbit control liquid rocket engine, the filling process and heat transfer characteristics of the engine during its start-up and shutdown were studied by experiments and simulations.The experimental study on the transient flow process of the transparent injector test piece was carried out, and the liquid flow process was photographed with a high-speed camera.The transient flow process of the injector test piece was simulated and the results were compared with the experimental results to verify the rationality of the volume of fluid(VOF)model.The simulation results show that the filling time difference of the engine in each installation direction under the ground state is not more than 0.1 ms, and the installation direction has little effect on the start-up filling process.The discharge process of propellant after shutdown in vacuum state is studied.The fuel is easier to return to the cavity than the oxidant, and this phenomenon in the inner ring is more likely occur than that of the outer ring.After evaporating for a long time, the gaseous fuel content of fuel flow path is closer to oxidant flow path, and part of the vapor returning to the cavity condenses and it mainly occurs in the central area of the oxidant flow path.

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