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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Imprimir: 2150-766X
ISSN On-line: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v8.i4.60
pages 329-344

EXPERIMENTAL STUDY OF MICROTHRUSTER HEAT LOSS

Alexander. B. Kiskin
Institute of Chemical Kinetics and Combustion, Novosibirsk 630090, Russia
Vladimir N. Simonenko
Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Novosibirsk 630090, Russia
Lev K. Gusachenko
Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Novosibirsk 630090
Oleg G. Glotov
Institute of Chemical Kinetics and Combustion, Russia
Vladimir Zarko
ICKC SB RAS

RESUMO

Due to the miniature sizes of microthrusters, their combustion efficiency is greatly affected by the relatively large heat loss and short residence time for the reaction products. This leads to a decrease in the gas temperature and completeness of combustion. As a result, the measured specific impulse for microthrusters, as a rule, turns out essentially lower than the theoretical one. To derive data needed for simulating this problem, the current research program has been developed and directed to the determination of the mechanism of energy loss in microthrusters and differentiation of various contributions into total energy loss. The propellant internal ballistic characteristics were obtained at different pressures for a chosen propellant containing a small additive of nanoaluminum. The casing of the microthruster was fabricated in the form of a cylinder made of fused quartz. The inner volume of the combustion chamber was about 0.07 cm3. In order to determine the parameters of heat exchange between the combustion products and combustion chamber walls, the temperature histories of the thruster casing and the combustion gases inside the chamber were recorded with microthermocouples. In addition, approximate mathematical model was developed for estimating the effect of heat loss on the delivered value of specific impulse. The results of preliminary calculations by the model are presented.

Referências

  1. Rossi, C. and Esteve, D., Micropyrotechnics, A New Technology for Making Energetic Microsystems, Review and Prospective.

  2. Lee, D.H. and Kwoon, S., Heat Transfer and Quenching Analysis of Combustion in Micro Combustion Vessel.


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