催化床结构对HAN基单组元发动机性能的影响  

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

作　　者：孙得川 张国强[2] 姚天亮 关亮 SUN Dechuan;ZHANG Guoqiang;YAO Tianliang;GUAN Liang(State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,China;School of Mechanics and Aeronautics and Astronautics,Dalian University of Technology,Dalian 116024,China;Shanghai Institute of Space Propulsion,Shanghai 201112,China)

机构地区：[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

出　　处：《航空学报》2024年第16期97-108,共12页Acta Aeronautica et Astronautica Sinica

基　　金：上海市优秀学术/技术带头人计划(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%。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 im⁃pulse 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%re⁃spectively,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 im⁃pulse by 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 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]