吸气式电推进中的气体捕集系统的设计分析
Design and Analysis of an Air-Intake System for Air-Breathing Electric Propulsion
查看参考文献20篇
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文摘
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针对吸气式电推进系统中的气体捕集系统,提出了一种能够准确计算气体捕集率的理论模型,并以此为基础开展了气体捕集系统的优化设计。首先,通过分析几类代表性气体捕集系统的捕集特点,提取了影响气体捕集率的关键参数。然后,通过分析进气道内气体分子的微观行为,推导得到了气体捕集率的理论公式,获得了无量纲管长、末端净透射率等关键参数对气体捕集率的影响规律。最后,利用理论模型,对实际飞行条件下的气体捕集系统开展了优化设计。结果表明,当末端净透射率给定时气体捕集率随无量纲管长先增后减,且最大捕集率与末端净透射率正相关。通过使用涡轮分子泵提升末端净透射率并对无量纲管长进行优化,实际飞行条件下的气体捕集率可以达到50%以上。 |
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其他语种文摘
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Air-breathing electric propulsion is a very promising propulsion technology for ultra-low-orbit satellite, and one of the keys is to efficiently collect atmospheric molecules as propellant. Several representative air-intake systems are compared and analyzed, which helps to summarize the basic principles to increase collection efficiency. The common physical problems in air-intake systems are then investigated through theoretical analysis and numerical simulation, and the influence of key parameters such as non-dimensional tube length and exit transmission probability on collection efficiency is obtained. It is found that when the non-dimensional tube length increases the collection efficiency first increases and then decreases, and the highest collection efficiency shows a positive correlation with the exit transmission probability. Based on the analysis,a preliminary design of air-intake system is provided for earth orbit at 150 km and the optimized collection efficiency is over 50%. |
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来源
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宇航学报
,2022,43(2):232-240 【核心库】
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DOI
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10.3873/j.issn.1000-1328.2022.02.012
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关键词
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吸气式电推进
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气体捕集
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自由分子流
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涡轮分子泵
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地址
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1.
中国科学院力学研究所空天飞行科技中心, 北京, 100190
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中国科学院力学研究所, 高温气体动力学国家重点实验室, 北京, 100190
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中国科学院大学工程科学学院, 北京, 100049
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-1328 |
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学科
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力学 |
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基金
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海南省重大科技项目
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中国科学院战略性先导科技专项
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文献收藏号
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CSCD:7180169
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