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

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

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.520
pages 486-491

STRUCTURE OF AMMONIUM DINITRAMIDE FLAME AT 4.0 MPa

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
Alexander A. Paletsky
Institute of Chemical Kinetics and Combustion, Siberian Branch Russian Academy of Sciences, 630090 Novosibirsk, Russia
A. G. Tereschenko
Institute of Chemical Kinetics and Combustion, Siberian Branch Russian Academy of Sciences, 630090 Novosibirsk, Russia
Tatyana A. Bolshova
Institute of Chemical Kinetics and Combustion, Siberian Branch Russian Academy of Sciences, 630090 Novosibirsk, Russia

ABSTRACT

The paper studies the structure of ammonium dinitramide (ADN) flame at 4.0 MPa using a probing mass-spectrometry, microthermocouples and modeling. Strands were burnt in a high-pressure combustion chamber in argon atmosphere. To withdraw sample from the field of high pressure and temperature a probe of stainless steel was used (an outlet orifice 170 μm in diameter, internal expansion angle of 40 deg). The temperature profiles were obtained using Pt-PtRh(10%) Π-shaped thermocouples 20 and 50 μm in diameter. Concentration profiles of the main species N2, O2, NO, N2O have been measured. Three main temperature zones have been determined or observed. In the first narrow (0.1 mm wide) low temperature zone nearby the burning surface the temperature raised from 640K to 970K. In the second zone about 1 mm wide the temperature raised from ∼970K to 1370K. At the distance more than 1 mm from the burning surface the third wide zone about 3−6 mm wide was found, where N2O is consumed and temperature further raised from ∼1370K to 1770K. The dependency of this zone width on ADN burning rate was found. The obtained experimental data (the combustion products composition and temperature) were used as boundary conditions for modeling the structure of ADN flame zone at 4.0 MPa using CHEMKIN Code. A mechanism incorporating 170 reactions for 29 species has been used for calculations. A satisfactory agreement of the experimental and calculation data is obtained.


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