|Table of Contents|

Simulation of oxygen-rich steam ejection in high altitude simulation test for hydrogen/oxygen rocket engine (PDF)

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

Issue:
2023年02期
Page:
100-106
Research Field:
目次
Publishing date:

Info

Title:
Simulation of oxygen-rich steam ejection in high altitude simulation test for hydrogen/oxygen rocket engine
Author(s):
ZHANG Xiaotong1;  LI Mao1; 2;  ZHANG Jiaxian1; 2;  LIU Ruimin1; 2
(1.Beijing Institute of Aerospace Testing Technology, Beijing 100074,China
Keywords:
hydrogen-oxygen engine;  high altitude simulation test;  supersonic-supersonic ejector;  oxygen rich steam ejection;  gas treatment
PACS:
V433.9
DOI:
-
Abstract:
During high altitude simulation test, hydrogen-rich gas is jetted out from hydrogen-oxygen rocket engine, where the residual hydrogen mixed with air backed up into the ejection system may explode.To study the technology of oxygen-rich steam ejection to treat the residual hydrogen in the high altitude simulation of hydrogen-oxygen rocket engine, the single-stage annular supersonic-supersonic ejector simulation was carried out using computational fluid dynamics and multi-step chemical reaction kinetics model to obtain the oxygen-rich steam ejection mean flow field.Analyzing the working characteristics of the ejector in the steady state, and the effects of oxygen concentration in oxygen-rich steam and steam temperature on the treatment of residual hydrogen were also investigated.The simulation results show that the annular ejector works normally in steady state when using oxygen-rich steam to inject.Afterburning occurs mainly in the shear mixing layer at the mixing chamber and the front section of the ejector.When the oxygen concentration or temperature of the oxygen-rich steam is increased, it can reduce the concentration of hydrogen in the exhaust gas of the ejector and enhance the treatment effect of hydrogen-rich gas.

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