Design and performance characterization of a sub-Newton N2O monopropellant thruster
Cai, Guobiao1; Sun, Wei1; Fang, Jie1; Li, Mao1; Cong, Yu2; Yang, Zhe3
KeywordNitrous Oxide Monopropellant Micro-propulsion Self-pressurization Preheating
Indexed BySCI
WOS HeadingsScience & Technology ; Technology
WOS SubjectEngineering, Aerospace
WOS Research AreaEngineering
AbstractThis paper describes the research at Beihang University for developing a sub-Newton thruster based on catalytic decomposition of nitrous oxide (N2O) for fine attitude control of small spacecrafts. The characteristics of the N2O self-pressurization feeding process as well as the preheating process of a sub-Newton N2O thruster were studied. Experimental and simulated results indicated that the tank pressure decreases during the N2O self-pressurization process. The influence on the preheating process of the surface emissivity, the preheating power, the thickness of combustor chamber and the insulation material, were compared. N2O catalytic decomposition experiments were carried out to evaluate the reaction performance of Iridium impregnated modified alumina catalyst, such as activation temperature and reaction temperature. Successful activation and self-sustaining reaction were achieved at 523 K. It was found that the integral structure of the reactor and the loading factor of the catalyst-bed can influence the reaction effect. Based on further experiments looking for proper catalyst-bed, a thruster with a 4310 mm x 25 mm catalyst-bed was designed and fabricated. The vacuum performance of the thruster at different N2O flow rates was evaluated using a vacuum experimental system, which consists of a vacuum chamber and a sub-Newton-thrust measuring stand. Static vacuum thrusts ranging from around 140 mN to 970 mN were achieved with the flow rates altering from around 0.1 g/s to 0.6 g/s. The highest specific impulse reached 1640 N s/kg. (C) 2011 Elsevier Masson SAS. All rights reserved.
WOS IDWOS:000313380100045
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Beihang Univ, Sch Astronaut, Beijing 100191, Peoples R China
2.Dalian Inst Chem Phys, Lab Catalysis & New Mat Aerosp, Dalian 116023, Liaoning, Peoples R China
3.Chinese Acad Space Technol, Beijing 100086, Peoples R China
Recommended Citation
GB/T 7714
Cai, Guobiao,Sun, Wei,Fang, Jie,et al. Design and performance characterization of a sub-Newton N2O monopropellant thruster[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2012,23(1):439-451.
APA Cai, Guobiao,Sun, Wei,Fang, Jie,Li, Mao,Cong, Yu,&Yang, Zhe.(2012).Design and performance characterization of a sub-Newton N2O monopropellant thruster.AEROSPACE SCIENCE AND TECHNOLOGY,23(1),439-451.
MLA Cai, Guobiao,et al."Design and performance characterization of a sub-Newton N2O monopropellant thruster".AEROSPACE SCIENCE AND TECHNOLOGY 23.1(2012):439-451.
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