DocumentCode :
1457995
Title :
Analysis of burning rate phenomena and extinguished solid propellants from an interrupted closed bomb with plasma igniter [ETC launchers]
Author :
Kaste, P. ; Birk, A. ; Kinkennon, A. ; Lieb, R. ; Del Guercio, M. ; Schroeder, M. ; Pesce-Rodrigucz, R.
Author_Institution :
Army Res. Lab., Aberdeen Proving Ground, MD, USA
Volume :
37
Issue :
1
fYear :
2001
fDate :
1/1/2001 12:00:00 AM
Firstpage :
173
Lastpage :
177
Abstract :
The morphological and chemical characterization of M30 propellants recovered after conventional and plasma ignition with polyethylene (PE) and polyethylene terephthalate (Mylar) in an interrupted closed bomb (extinguished at pressures between 35 and 100 MPa) has been performed. This work was undertaken to investigate mechanisms associated with the apparent burning rate augmentation of M30 under conditions of plasma ignition compared to conventional ignition. Burning rate augmentation of solid propellants with plasma ignition was found to occur during, but not after, the plasma event. The following factors are evidence of a more forceful process for plasma ignition compared to conventional ignition: a) the initial pressure rise was greater with plasma ignition; b) metals from the closed bomb hardware, and stripping of NQ from M30 propellants was observed in the perforations; c) irregular surface burning (possibly due to ablation). And hot embedded particles have been observed in grains after plasma, but not conventional, ignition. Extensive chemical analyses of extinguished grains have been performed, but no significant differences were revealed between plasma and conventional ignition, quite possibly because any early chemical interactions are obscured by normal burning processes occurring later
Keywords :
combustion; electric ignition; electrothermal launchers; explosions; plasma devices; 35 to 100 MPa; ETC guns; M30 propellants; Mylar; burning rate augmentation; burning rate phenomena; chemical characterization; electrothermochemical launchers; initial pressure rise; interrupted closed bomb; irregular surface burning; morphological characterization; plasma igniter; plasma ignition; polyethylene; polyethylene terephthalate; solid propellants; Chemical analysis; Chemical processes; Hardware; Ignition; Plasma chemistry; Polyethylene; Propellants; Solids; Surface morphology; Weapons;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.911815
Filename :
911815
Link To Document :
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