Journal ArticleDOI
Composite solid propellant ignition - Ignition of ammonia and other fuels by perchloric acid vapor.
G. S. Pearson,D. Sutton +1 more
TLDR
In this article, it was shown that in ammonium perchlorate propellents the important reactions leading to ignition are heterogeneous rather than homogeneous, and that in a catalysed propellent the reaction of ammonia and perchloric acid on the surface of the catalyst is the significant reaction.Abstract:
: The ignition of polyisobutene, polyurethane, polystyrene and polymethyl-methacrylate has been studied with oxygen gas and with perchloric acid vapour under the same experimental conditions. All these fuels ignited with perchloric acid vapour at 200-250C whereas ignitions with oxygen were only achieved at temperatures above 350C. Less volatile fuels such as carbon black, nylon and terylene also ignited with perchloric acid vapour at 200-250C. ignition of ammonia, methane, ethylene and isobutene was not achieved by perchloric acid vapour in the absence of a surface at 200-250C. In the presence of a surface the order of decreasing ignitability was ammonia, isobutene, ethylene, methane. Cupric chromate and ferric oxide were effective catalysts in the ignition of gaseous fuels with perchloric acid vapour. Titanium dioxide, silica and alumina had no detectable effect. It is concluded that in ammonium perchlorate propellents the important reactions leading to ignition are heterogeneous rather than homogeneous, and that in a catalysed propellent the reaction of ammonia and perchloric acid on the surface of the catalyst is the significant reaction. The results are discussed in relation to current theories of the mechanism of the ignition of composite solid propellents containing ammonium perchlorate.read more
Citations
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Solid propellant chemistry, combustion, and motor interior ballistics
TL;DR: In this article, the authors present in-depth coverage on a wide range of topics including advanced materials and non-traditional formulations; the chemical aspects of organic and inorganic components in relation to decomposition mechanisms, kinetics, combustion and modelling; safety issues, hazards and explosive characteristics; and experimental and computational interior ballistics research, including chemical information and the physics of the complex flow field.
Journal ArticleDOI
Theory of ignition of solid propellants.
TL;DR: The surface ignition of solid propellants has been represented by several analytical models, each involving obvious compromises with regard to the scope of applicability as discussed by the authors, and these models are distinguishable primarily in terms of site of the exothermic reaction governing ignition.
Journal ArticleDOI
Location of action of burning-rate catalysts in composite propellantcombustion.
TL;DR: HUG as mentioned in this paper is a Fortran-Fap Code for Computing Normal Shock and Detonation Parameters in Gases, which can be used to compute normal shock and detonation parameters in O2-H2 Mixtures.
Journal ArticleDOI
Composite propellent catalysts: Copper chromate and chromite
TL;DR: In this article, the thermal decomposition of copper chromate and chromite has been examined by simultaneous thermogravimetric analysis and differential thermal analysis and it has been shown that both ultimately yield cuprous chromite and cuprous oxide.
Journal ArticleDOI
The Role of Catalysts in the Ignition and Combustion of Solid Propellants
TL;DR: In this paper, the decomposition and combustion of ammonium perchlorate are reviewed with particular emphasis on the chemistry of the process and on the role of catalysts, and the possible reaction mechanisms to attempt to select the specific areas requiring further investigation.
References
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Journal ArticleDOI
An Approximation Theorem for Functionals, with Applications in Continuum Mechanics
Bernard D. Coleman,Walter Noll +1 more
TL;DR: In this paper, a brief discussion of the physical motivation behind the mathematical considerations to be presented in Part I of this paper is presented. But this discussion is limited to the case where the authors are concerned with a single point of view.
Journal ArticleDOI
Theory of ignition of solid propellants.
TL;DR: The surface ignition of solid propellants has been represented by several analytical models, each involving obvious compromises with regard to the scope of applicability as discussed by the authors, and these models are distinguishable primarily in terms of site of the exothermic reaction governing ignition.
Journal ArticleDOI
Dissociation pressure of ammonium perchlorate1
Journal ArticleDOI
The three dimensional incompressible laminar boundary layer on a spinning cone
TL;DR: In this paper, the motion of an incompressible viscous fluid induced by a spinning cone is analyzed and similar solutions of the relevant steady state boundary equations are obtained using the Karman-Cochran solution for the infinite disc.
Journal ArticleDOI
Initiation of ammonium perchlorate—Ignition by chromic oxidetitanium dioxide catalysts
TL;DR: In this article, the effect of chromic oxide and n-type titanium dioxide on the initiation of the explosion of ammonium perchlorate has been studied and the critical temperature for the explosion has been determined, in the presence of both substances, as well as the activation energy of the process which leads to the explosion.