|Table of Contents|

Influence of ignition relay process of gas generator onstarting performance of engines(PDF)

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

Issue:
2021年03期
Page:
74-82
Research Field:
研究与设计
Publishing date:

Info

Title:
Influence of ignition relay process of gas generator onstarting performance of engines
Author(s):
JIANG Lei1; LIU Shang1; LIU Zhirang2; HAN Hongwei1
1.Science and Technology on Liquid Rocket Engine Laboratory,Xi'an 710100,China; 2.Academy of Aerospace Propulsion Technology,Xi'an 710100,China
Keywords:
liquid propellant rocket engine;  open-cycle;  forced start-up;  liquid oxygen/kerosene;  numerical simulation
PACS:
V434.1
DOI:
-
Abstract:
Using the open-cycle LOX/kerosene rocket engine as an example,the engine start-up characteristics were investigated.The simulation model of the engine start-up process was established,and the calculated performance parameter curves basically accorded with the test data,which preliminarily verified the feasibility of the simulation model.The influence of ignition relay process of gas generator on engine starting performance was further analyzed.The results demonstrate that when gas generator uses oxygen-enriched ignition,the fuel valve of gas generator opened early,the gas generator and the solid starter work together for a long time,and the acceleration time of engine is short,but the parameter overshoot is large; when the fuel valve of gas generator opened late,there is a lot of oxidant accumulated in the gas generator,the temperature peak and pressure peak are large during ignition; the gas generator needs to ignite before the pressure of the solid starter drops rapidly to prevent accumulated oxidant and fuel-rich gas from reacting at the equivalent mixing ratio,thereby releasing a lot of heat; when theoxygen valve opening time of gas generator is late,the opening time difference between oxygen valve and fuel valve of the gas generator can be reduced to reduce the ignition temperature peak and pressure peak.

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Last Update: 1900-01-01