航空学报 > 2024, Vol. 45 Issue (16): 129818-129818   doi: 10.7527/S1000-6893.2023.29818

催化床结构对HAN基单组元发动机性能的影响

孙得川1,2(), 张国强2, 姚天亮3, 关亮3   

  1. 1.大连理工大学 工业装备结构分析优化与CAE软件全国重点实验室,大连 116024
    2.大连理工大学 力学与航空航天学院,大连 116024
    3.上海空间推进研究所,上海 201112
  • 收稿日期:2023-11-01 修回日期:2023-11-07 接受日期:2023-12-25 出版日期:2024-01-05 发布日期:2024-01-04
  • 通讯作者: 孙得川 E-mail:dechuans@dlut.edu.cn
  • 基金资助:
    上海市优秀学术/技术带头人计划(22XD1422000)

Influence of catalyst bed structure on performance of HAN⁃based monopropellant engine

Dechuan SUN1,2(), Guoqiang ZHANG2, Tianliang YAO3, Liang GUAN3   

  1. 1.State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,China
    2.School of Mechanics and Aeronautics and Astronautics,Dalian University of Technology,Dalian 116024,China
    3.Shanghai Institute of Space Propulsion,Shanghai 201112,China
  • Received:2023-11-01 Revised:2023-11-07 Accepted:2023-12-25 Online:2024-01-05 Published:2024-01-04
  • Contact: Dechuan SUN E-mail:dechuans@dlut.edu.cn
  • Supported by:
    Program of Shanghai Academic/Technology Research Leader(22XD1422000)

摘要:

针对硝酸羟胺(HAN)基推进剂单组元发动机,研究催化床长度和空腔缺陷对发动机工作过程的影响。采用多孔介质假设、Volume of Fluid(VOF)模型以及推进剂分解模型对300 N发动机稳态工作状态和起动过程进行数值仿真。研究结果表明:增加前床长度有利于提高性能,将前床长度由30 mm增加到40 mm,真空比冲提高2.7%。但是,增大前床长度会使响应变慢,不仅使燃气充填阶段末的压强值和温度值分别减小6.7%和12.5%,而且使催化床升温引起的升压时间增加。空腔缺陷会显著降低发动机的性能,前床长度为40 mm时,5 mm的空腔就会使真空比冲降低15%。

关键词: 硝酸羟胺, 催化床结构, 单组元液体火箭发动机, 稳态工作过程, 起动过程

Abstract:

The influence of catalyst bed length and cavity defects on the engine operation process was investigated for a Hydroxylamine Nitrate (HAN)-based monopropellant engine. Numerical simulations were conducted to examine the steady-state operation and startup process of a 300 N engine using porous media assumption, the Volume of Fluid (VOF) model, and the propellant decomposition model. The results indicate that increasing the length of the front bed contributes to performance improvement. By increasing the front bed length from 30 mm to 40 mm, the specific impulse in vacuum is enhanced by 2.7%. However, increasing the length of the front bed leads to a slower response. This not only reduces the pressure and temperature values at the end of the gas filling stage by 6.7% and 12.5% respectively, but also increases the pressurization time caused by the catalyst bed heating. Cavity defects significantly reduce engine performance. When the front bed length is 40 mm, the 5 mm cavity reduces the vacuum specific impulse by 15%.

Key words: hydroxylamine nitrate, catalytic bed structure, liquid-monopropellant rocket engine, stead-state process, start-up process

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