Aluminum Particle Combustion in High-Speed Detonation Products

Tanguay, Vincent; Goroshin, Samuel; Higgins, Andrew; Zhang, F.

doi:10.1080/00102200802643430

Cited by 52 publications

(29 citation statements)

References 12 publications

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“…The parameters of interest in the study have applications in the investigation of Shock Dispersed Fuel (SDF) charges [2] as well as aluminized explosives. While this study considers aluminum particles due to recent interest in its burning under shocked/detonation conditions [12,13], the same approach can be extended to magnesium and zirconium as well-other metals widely used in explosives. The ignition, combustion and clustering effects of the particle cloud are studied in detail and explained.…”

Section: Introductionmentioning

confidence: 98%

Clustering and combustion of dilute aluminum particle clouds in a post-detonation flow field

Balakrishnan¹,

Ukai²,

Menon³

2011

Proceedings of the Combustion Institute

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Section: Introductionmentioning

confidence: 98%

Clustering and combustion of dilute aluminum particle clouds in a post-detonation flow field

Balakrishnan¹,

Ukai²,

Menon³

2011

Proceedings of the Combustion Institute

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“…Following past studies [8,9], evaporation law specified as, dr p dt = − r p t b 1 + 0.276(Re) 0.5 , is used, where r p denotes the particle radius, Re, the particle Reynolds number, and t b , the burning time. The burn time data from [9] is used here and the ignition temperature of the aluminum particles is assumed to be 1000 K [8].…”

Section: Methodsmentioning

confidence: 99%

Simulations of heterogeneous detonations and post-detonation turbulent mixing and afterburning

Gottiparthi¹,

Menon²

2012

AIP Conference Proceedings

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Abstract. We conduct three-dimensional numerical simulations of the propagation of blast waves resulting from detonation of a nitromethane charge of radius 5.9 cm loaded with aluminum particles and analyze the afterburn process as well as the generation of multiple scales of mixing in the post detonation flow field. In the current study, the particle combustion is observed to be dependent on particle dispersal and mixing of gases in the flow where particle dispersal spreads aluminum within the flow and mixing provides the necessary oxidizer. Thus, 5 μm aluminum particles are burnt more effectively in comparison to 10 μm particles for a fixed initial mass of particles. Also, for a fixed initial particle size, increase in the initial mass of aluminum particles resulted in greater mixing.

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“…If the particle diameter is of nanometer scale, the combustion becomes kinetics-controlled rather than diffusion-controlled [26,27]. Tanguay et al [28] found that the even the particle with the diameter 100 lm, the kinetics-controlled combustion may appear due to the high-speed flow behind the leading shock of the detonation. Usually, the diameter of Al particles is less than 5 lm, thus kinetics-controlled combustion is relevant.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of one-dimensional aluminum particle–air detonation with realistic heat capacities

Teng

Jiang²

2013

Combustion and Flame

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a b s t r a c t Aluminum (Al) particle-air detonation is very complicated because it includes multi-phase combustion phenomenon. Thus numerical simulations are often over-simplified. Here, the detonation is simulated by solving one-dimensional equations with more realistic heat capacities that vary with the dust mixture temperature. The effect on detonation parameters from the realistic heat capacities for the solid particles is investigated with a hybrid combustion model. The calculated results indicate that the detonation pressure, temperature and velocity vary significantly with changes in the heat capacity. Except for the velocity, these parameters are overestimated in numerical simulations when a constant heat capacity of the pre-shock mixtures is used. Furthermore, the realistic heat capacities have a strong effect on small diameter particles, but a weak effect on large diameter particles. Thus, when constant heat capacities are used, the combustion characteristic lengths are a function of the particle diameters with a power dependence of 1.77, whereas the power dependence decreases to 1.49 when realistic heat capacities are used. Moreover, if realistic heat capacities are applied, an ''abnormal'' strong detonation wave may appear in a dust mixture having large diameter particles. This phenomenon is consistent with the current combustion model, but it indicates that the value of heat released should also vary with the gas temperature in a fashion similar to that of the heat capacities.

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Aluminum Particle Combustion in High-Speed Detonation Products

Cited by 52 publications

References 12 publications

Clustering and combustion of dilute aluminum particle clouds in a post-detonation flow field

Clustering and combustion of dilute aluminum particle clouds in a post-detonation flow field

Simulations of heterogeneous detonations and post-detonation turbulent mixing and afterburning

Numerical simulation of one-dimensional aluminum particle–air detonation with realistic heat capacities

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