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[1]姜 垒,刘 上,刘志让,等.燃气发生器点火接力过程对发动机起动性能的影响[J].火箭推进,2021,47(03):74-82.
　JIANG Lei,LIU Shang,LIU Zhirang,et al.Influence of ignition relay process of gas generator onstarting performance of engines[J].Journal of Rocket Propulsion,2021,47(03):74-82.
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燃气发生器点火接力过程对发动机起动性能的影响

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 47 期数: 2021年03期 页码: 74-82 栏目: 研究与设计 出版日期: 2021-06-30
Title:
Influence of ignition relay process of gas generator onstarting performance of engines
文章编号:
1672-9374(2021)03-0074-09
作者:
姜 垒1; 刘 上1; 刘志让2; 韩红伟1
1.液体火箭发动机技术重点实验室,陕西 西安 710100; 2.航天推进技术研究院,陕西 西安 710100
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
关键词:
液体火箭发动机;  开式循环;  强迫起动;  液氧煤油;  数值仿真
Keywords:
liquid propellant rocket engine;  open-cycle;  forced start-up;  liquid oxygen/kerosene;  numerical simulation
分类号:
V434.1
文献标志码:
A
摘要:
以开式循环液氧煤油发动机系统为研究对象,对其强迫起动特性进行研究。搭建了发动机起动过程的系统级仿真模型,计算得到的性能参数曲线与试验数据相吻合,验证了仿真模型的准确性。进一步分析了燃气发生器点火接力过程对发动机起动性能的影响。结果表明:在燃气发生器采用富氧点火时,当燃料副阀打开早,燃气发生器与火药起动器共同工作时间长,发动机起动加速性好,但起动参数超调量大; 当燃料副阀打开晚,燃气发生器中积存的氧化剂多,点火时温度峰、压力峰大; 燃气发生器需在火药起动器压力迅速下降前点火,以防止积存的氧化剂与高温富燃的火药燃气以当量混合比在涡轮入口处反应,从而释放大量热量; 当氧副阀打开时间晚,可适当减小氧副阀与燃料副阀打开时差,以减小点火温度峰及压力峰。
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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备注/Memo

收稿日期：2020-08-18; 修回日期:2020-09-08
基金项目：国家级重点实验室基金项目(6142704180307)
作者简介：姜垒(1998—),男,硕士,研究领域为液体火箭发动机起动过程动态仿真。

更新日期/Last Update: 1900-01-01