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ISSN Print: 2150-766X
ISSN Online: 2150-7678
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RDX AND HMX FLAME STRUCTURE AT A PRESSURE OF 0.1 MPa
ABSTRACT
The chemical flame structure of cyclic nitramines (HMX, RDX) was investigated at a pressure of 0.1 MPa using molecular beam mass spectrometry. HMX and RDX strands were burned in air and argon atmosphere, respectively. It was obtained that at atmospheric pressure combustion of HMX (unlike to RDX) is unstable. Eleven species (H2, H2O, HCN, CO2, CO, N2, N2O, CH2O, NO, NO2 and nitramine vapor (HMX or RDX)) were found in flames of HMX and RDX during its self-sustained combustion at a pressure of 0.1 MPa. It was found that nitramine flame at a pressure of 0.1 MPa has a two-zone structure. In the first flame zone, the consumption of nitramine vapor (HMX or RDX), NO2, CH2O and partial consumption of N2O with formation of H2, H2O, CO, N2, CO2, HCN and NO occurs. In the second flame zone, the main reaction is oxidation of HCN by NO accompanied with formation of final combustion products. Using experimental data, brutto-reactions for the gasification of nitramines at atmospheric pressure were determined. Data obtained in this work can be used for further development of the mechanism of gas-phase chemical reactions occurring in RDX and HMX flames.