Composite solid-propellant ignition by radiant energy

Shannon, L.J.

doi:10.2514/3.5667

Cited by 35 publications

(9 citation statements)

References 13 publications

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“…The presence of oxygen in the atmosphere in which the polymer was being pyrolysed increased both the rate of pressure increase and the rate of weight loss indicating attack of oxygen on the polymer prior to vaporisation. These results on the effect of oxygen are in basic agreement with those obtained previously (Shannon (1969». Catalysts had been shown (Pearson and Sutton (1969» to promote the decomposition of perchloric acid and this was later confirmed (Solymosi et al (1968) and and again more recently (Gilbert and Jacobs (1970». Further experiments were then made to study the interaction of fuel and perchloric acid in the presence of catalysts. It was found that the ignition of TPX in the presence of perchloric acid and oxygen could be achieved by the presence of catalyst.…”

Section: Ap Related Chemistrysupporting

confidence: 92%

“…oxygen containing, is very different from polymer pyrolysis in an inert environment, and that the presence of copper chromite promoted oxidative decomposition. Basically similar findings for polymer pyrolysis were also made at UTC (Shannon (1969». However, these results did not differentiate between the possible mechanisms-a reactive atmosphere reacting with gaseous or solid fuel and a catalyst affecting some stage of the reaction. Attempts to elucidate this are described in the following section.…”

Section: Ap Combustionsupporting

confidence: 79%

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The Role of Catalysts in the Ignition and Combustion of Solid Propellants

Pearson

1971

Combustion Science and Technology

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Recent studies on the decomposition and combustion of ammonium perchlorate are reviewed with particular emphasis on the chemistry of the process and on the role of catalysts. This is used for a detailed discussion of the possible reaction mechanisms to attempt to select the specific areas requiring further investigation, both to extend the understanding of the combustion mechanism and to improve the basis of the theoretical models.

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Section: Ap Related Chemistrysupporting

confidence: 92%

Section: Ap Combustionsupporting

confidence: 79%

The Role of Catalysts in the Ignition and Combustion of Solid Propellants

Pearson

1971

Combustion Science and Technology

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“…It is seen that the effect of pressure which is small with low external heat fluxes becomes large with higher heat fluxes, consistent with the experimental data of Hightower [1967] and others [Fishman, 1967;Shannon, 1970]. The empirical relationship given by Eq.…”

Section: Ignition Delaysupporting

confidence: 77%

“…The empirical relationship given by Eq. (9) yields results that agree qualitatively with various ignition data [Fishman, 1970;Rosser et aI., 1966a;Shannon, 1970] for propellants based on AP. This indicates the usefulness ofEq.…”

Section: Ignition Delaysupporting

confidence: 77%

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Ignition of Ammonium Perchlorate

Sohn

1979

Chemical Engineering Communications

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A simplified theory for the ignition of ammonium perchlorate is proposed, which is derived from a unified theory that also explains the low-pressure deflagration limit as well as the steady deflagration. The theory provides an approximate method of calculating the ignition delay and the minimum external heat flux for a successfulignition. as functions of pressure andinitial solid temperature. The ignition calculationsshowthat there exists a pressure limit due to the weakness of the igniter strength, in addition to the low-pressure deflagration limit which is an inherent property of the solid independent of the igniter strength. The theory can be extended to other monopropellants for which exothermic reaction occurs only in the gas phase.

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Ignition of composite propellant at subatmospheric pressures by means of carbon dioxide laser

Sofue

Iwama

1979

Propellants Explo Pyrotec

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Ignition behavior of solid propellant composed of 25 wt% polybutadiene and 75% ammonium perchlorate under subatmospheric conditions has been studied using a carbon dioxide laser whose radiant flux is uniformalized. Data of ignition time in Ar, N2 and He atmospheres, and critical radiant flux and pressures over which ignition might be achieved, were obtained. Moreover, the data were compared with theoretical values, taking account of variable heat conductivity for the ambient gases with a surface ignition hypothesis. It is concluded that these ambient gases participate in the pre‐ and post‐ignition reactions and the ignition preventive behavior of He atmosphere is not predictable merely based on its high transport properties. The detailed observation of the ignition transient near the critical pressure revealed that the ignition in Ar atmosphere occurs in gas phase under less than 100 torr whereas in He atmosphere it occurs always at the condensed phase surface.

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Composite solid-propellant ignition by radiant energy

Cited by 35 publications

References 13 publications

The Role of Catalysts in the Ignition and Combustion of Solid Propellants

The Role of Catalysts in the Ignition and Combustion of Solid Propellants

Ignition of Ammonium Perchlorate

Ignition of composite propellant at subatmospheric pressures by means of carbon dioxide laser

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