航空学报2025，Vol.46Issue(16)：1-14,14.DOI:10.7527/S1000-6893.2024.31569
吸气式电推进系统进气道性能数值研究与可行性分析
Numerical investigation of inlet performance of an atmosphere-breathing electric propulsion system and its feasibility analysis
苏鹏辉 1刘奕豪 1靳旭红 2程晓丽1
作者信息
- 1. 中国航天空气动力技术研究院,北京 100074||中国航天科技集团有限公司 航天飞行器气动热防护实验室,北京 100074
- 2. 中国航天空气动力技术研究院,北京 100074||中国航天科技集团有限公司 航天飞行器气动热防护实验室,北京 100074||昆明理工大学 民航与航空学院,昆明 650500
- 折叠
摘要
Abstract
To achieve a wide-range design for the inlet of the atmosphere-breathing electric propulsion system operat-ing in the upper atmosphere,a comprehensive numerical analysis is performed to investigate gas flows inside the inlet using the direct simulation Monte Carlo method.The effects of inlet geometry and Gas-Surface Interaction(GSI)model on flow features and compression and collection performances are considered,and the underlying physical mechanism is interpreted based on the gas kinetic theory.Results show that when the GSI is completely diffuse reflec-tion,the converging effect induced by the concave inlet leads to a larger gas pressure and mass flux and a high-pressure region closest to the ionization section,while the diverging effect caused by the convex inlet results in a smaller gas pressure and mass flux and a high-pressure region far from the ionization section.When the GSI accom-modation coefficient σ=0.5,both the gas pressure and mass flux achieve their local peak values at some locations in the ionization section.The underlying mechanism behind the phenomena is that after reflecting in a specular manner from the concave surface similar to a paraboloid,gas molecules congregate at the focus and enter the ionization sec-tion.The drop of GSI accommodation coefficient from 1 to 0.5 brings about a considerable increase in the compres-sion factor and collection efficiency,achieving a rate of increase of 85%-125%and 55%-77%,respectively.For the cases of completely and partially diffuse reflections,the concave inlet has the best compression and collection perfor-mances.It can be assumed that with reasonable ionization efficiency and exhaust velocity,the concave inlet with a GSI accommodation coefficient of 0.5 can produce a thrust larger than atmospheric drag at the altitude of 180 km.Therefore,this inlet design is feasible in concept.关键词
上层大气层/吸气式电推进/进气道设计/气固相互作用/气体压缩和收集Key words
upper atmosphere/air-breathing electric propulsion/inlet design/gas-surface interaction/gas com-pression and collection分类
航空航天引用本文复制引用
苏鹏辉,刘奕豪,靳旭红,程晓丽..吸气式电推进系统进气道性能数值研究与可行性分析[J].航空学报,2025,46(16):1-14,14.
