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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Druckformat: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.60
pages 38-47

STUDY OF FLAME STRUCTURE, KINETICS AND MECHANISM OF THE THERMAL DECOMPOSITION OF SOLID PROPELLANTS BY PROBING MASS SPECTROMETRY

Oleg P. Korobeinichev
Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Institutskaya St. 3, Novosibirsk, 630090 Novosibirsk region, Russia
L. V. Kuibida
Institute of Chemical Kinetics and Combustion, Siberian Branch Russian Academy of Sciences, 630090 Novosibirsk, Russia
Alexander A. Paletsky
Institute of Chemical Kinetics and Combustion, Siberian Branch Russian Academy of Sciences, 630090 Novosibirsk, Russia
Andrey G. Shmakov
Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Institutskaya St. 3, Novosibirsk, 630090 Novosibirsk region, Russia

ABSTRAKT

The methods for the study of flame structure and kinetics of the thermal decomposition of solid propellant (SP) by probing mass spectrometry (PMS) are described. Several types of setups based on microprobe and molecular beam mass spectrometric probing for the study of SP flame structure at high (10 atm) and low (≤1 atm) pressures have been developed. An installation for studying thermal decomposition of SP at the high heating rate of SP specimen up to 20−100 degree/s under the condition approximately similar to those present in the condensed phase in the vicinity of the burning surface is described. The results of the investigation of the flame structure of SP ingredients (RDX, ADN), sandwich systems are presented. Profiles of the species concentrations in flames have been measured. The main reaction in high temperature zone of RDX and ADN flames has been determined. The results of RDX flame structure modeling are in a good agreement with the experimental ones. The results of probing gas phase zone at ADN deflagration at 1, 3 and 6 atm. are presented. Flame structure studies of sandwich based on AP allowed a confirmation of multizone structure and step-by-step mechanism of reactions in AP flame. A study of thermal decomposition of ammonium dinitramide (ADN) by molecular beam mass spectrometry has been carried out. The products of ADN thermal decomposition and products release rates on heating rate of 20 deg/s has been obtained. Data obtained by PM at the SP combustion and decomposition chemistry are discussed and compared with literature data.


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