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The Effect of Some Amines on Ignition Delay Time of Dimethyl Amino Ethyl Azide (DMAZ) and White Fuming Nitric Acid (WFNA)
Author(s) -
Pakdehi Shahram G.,
Shirzadi Bahman
Publication year - 2018
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.201700208
Subject(s) - nitric acid , ignition system , chemistry , pyrrole , azide , nuclear chemistry , inorganic chemistry , organic chemistry , physics , thermodynamics
Dimethyl amino ethyl azide (DMAZ), as a non‐carcinogen liquid fuel, is a good fuel in space programs. However, it suffers from high ignition delay (ID) time with liquid oxidizer white fuming nitric acid (WFNA). DMAZ were blended with amines in order to reduce the ID time of bipropellant DMAZ‐WFNA. A drop‐on‐pool impingement set‐up, coupled with a high‐speed camera, was applied to investigate the ID time at ambient pressure and temperature. It was found that using of amines had dissimilar effects on the ID time of the bipropellant DMAZ‐WFNA. Results showed that among the amines, pyrrole, tert‐butylamine, n‐octylamine reduced the ID time significantly. This study identified pyrrole as the most efficient “additive” for decreasing ID time (from 90 milliseconds to 20 milliseconds). Finally, a quantum molecular dynamics simulation was conducted to probe how the additive affects on the ID time.