Combustion of ammonium perchlorate spheres in a flowing gaseous fuel

Barrère, M.; Nadaud, L.

doi:10.1016/s0082-0784(65)80272-7

Cited by 19 publications

(4 citation statements)

References 3 publications

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“…Equation (2) works for several situations not covered by the D 2 law. For example, monopropellant droplets show that 1 6 n 6 2 [16,17]; for burning of solid fuels, n = 3 [17]; for strong convection n = 3/2, and for burning in turbulent flow n = 1 [18].…”

Section: Correlation Of Droplet Diameter Datamentioning

confidence: 99%

Experimental study of the effect of helium/nitrogen concentration and initial droplet diameter on nonane droplet combustion with minimal convection

Bae¹,

Avedisian²

2007

Proceedings of the Combustion Institute

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Section: Correlation Of Droplet Diameter Datamentioning

confidence: 99%

Experimental study of the effect of helium/nitrogen concentration and initial droplet diameter on nonane droplet combustion with minimal convection

Bae¹,

Avedisian²

2007

Proceedings of the Combustion Institute

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“…Vaporization Rate Independent of Droplet Radius Barrere and Nadaud (1965) report experiments involving decompositional burning of spheres in reactive atmospheres in which m* was independent of radius. In lerms of the current formulation their result implies m = 0(e'/2).…”

Section: Vaporization Rate Proportional To Droplet Radiusmentioning

confidence: 99%

“…(See Lawver (1966) and Breen and Beltran (1967) and the references cited therein.) Another example for which experimental results are available is the burning of ammonium perchlorate spheres in a hydrogen or propane atmosphere [Barrere and Nadaud (1965)]. Thus the droplet may vaporize and decompose to yield either the oxidant which then burns in a gaseous fuel, or else the combustible fuel which then combines exothermically with the ambient oxidant.…”

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Quasi-Steady Sphericosymmetric Monopropellant Decomposition in Inert and Reactive Environments

Fendell¹

1969

Combustion Science and Technology

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The quasi-sleady adiabatic vaporization and subsequent exothermic decomposition of a pure monopropellant spherical droplet is examined in the absence of free and forced convection. The Lewis number is fixed at unity and linear variation of the universal diffusion coefficient with temperature is adopted. A direct one-step first-order dccompositional burning is postulated. By means of inner-and-outer (matched asymptotic) expansions the vaporization rate is analytically determined for cases in which the ambient atmosphere is inert with respect 10 the product of decomposition. Both the case of very large and very small first Damkohler number is considered (where the first Damkohler number is the ratio of the rate of reaction 10 the rate of mass diffusion). Then a two-step irreversible reaction model is examined for the case in which the ambient atmosphere is reactive, in bipropellant fashion, with the product of decomposition. Conditions for sequential concentric flames are described.

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“…These can only be used to provide an insight into the combustion mechanism of a composite propellant if their behavior is studied at a low enough pressure that the thickness of the gas phase flame is of the same order as the scale of heterogeneity (unmixedness), as is the case in a composite solid propellant. Unfortunately, various studies of the burning behavior of large ammonium perchlorate speres (-1 cm diameter) (41,99) and of thick (e 1 cm) binder-ammonium perchlorate sandwiches (43,77, 78,100) have been carried out at very high pressure with very little attention being given to the scaling problem. Such results are of little use in interpreting the combustion mechanism of a composite propellant.…”

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confidence: 99%