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- Title
Multistage mechanism of thermal decomposition of hydrogen azide.
- Authors
Bolshova, T.; Paletsky, A.; Korobeinichev, O.; Knyazev, V.
- Abstract
A kinetic mechanism for combustion of hydrogen azide (HN) comprising 61 reactions and 14 flame species (H, H, N, NH, NH, NNH, NH, HN, N, NH, NH, NH, N, and Ar) was developed and tested. The CHEMKIN software was used to calculate the flame speed at a pressure of 50 torr in mixtures of HN with various diluents (N and Ar), as well as the self-ignition parameters of HN (temperature and pressure) at a fixed ignition delay. The modeling results of the flame structure of HN/N mixtures show that at a 25-100% concentration of HN in the mixture, the maximum temperature in the flame front is 25-940 K higher than the adiabatic temperature of the combustible mixture. Analysis of the mechanism shows that burning velocity of a HN/N mixture at a pressure of 50 torr is described by the Zel'dovich-Frank-Kamenetskii theory under the assumption that the burn rate controlling reaction is HN + M = N + NH + M (M = HN) provided that its rate constant is determined at a superadiabatic flame temperature. The developed mechanism can be used to describe the combustion and thermal decomposition of systems containing HN.
- Subjects
CHEMICAL decomposition; HYDRONITRIC acid; CHEMICAL species; ADIABATIC temperature; IGNITION temperature; CHEMICAL reactions
- Publication
Combustion, Explosion, & Shock Waves, 2014, Vol 50, Issue 1, p10
- ISSN
0010-5082
- Publication type
Article
- DOI
10.1134/S001050821401002X