RT Journal Article
ID 1c1eda6248a0e676
A1 Sinditskii, Valery
A1 Fogelzang, A. E.
A1 Egorshev, Viacheslav Yu.
A1 Levshenkov, Anton I. 
A1 Serushkin, Valery V. 
A1 Kolesov, V. I.
T1 COMBUSTION PECULIARITIES OF ADN AND ADN-BASED MIXTURES
JF International Journal of Energetic Materials and Chemical Propulsion
JO IJEMCP
YR 2002
FD 2002-01-01
VO 5
IS 1-6
SP 502
OP 512
K1 Combustion
K1 combustion mechanism
K1 ammonium dimtramide
K1 water solutions of ADN
AB The present paper is devoted to a detailed analysis of the effect of additives, material of the surrounding shell, and the pellet cross-section size on the ammonium dimtramide (ADN) combustion peculiarities. A mechanism has been proposed to explain the influence of small amounts of different substances added to ADN on its combustion behavior and the low-pressure limit of self-sustained burning. The temperature distribution in the ADN combustion wave has been measured in the 0.04&minus;4.1 MPa pressure range using thin tungsten-rhenium thermocouples. The temperature profiles has revealed the two-zone structure of the ADN gas flame. The first flame includes the complete oxidation of NH<sub>3</sub>. In the second flame, the complete thermodynamic heat release is attained. The surface temperature has been shown to be defined by the dissociation reaction of ammonium nitrate (AN) formed in the initial stage of ADN decomposition and accumulated in the condensed phase. The temperature just above the surface is also controlled by the dissociation reaction occurring at the surface of small droplets. A distinctive feature of redox reactions in both condensed and first flame zone consists in that one NH<sub>3</sub> molecule is enough to reduce the most reactive radical-oxidizers, OH and NO<sub>2</sub>, produced in decomposition of one ADN molecule. Any fuel additives to ADN, therefore, can little affect the chemistry in the condensed zone and first flame. The observed combustion behavior of ADN mixtures with paraffin wax, water, and ammonium hydroxide solution is in line with the above reasoning.
PB Begell House
LK https://www.dl.begellhouse.com/journals/17bbb47e377ce023,76f8e14974df93a8,1c1eda6248a0e676.html