On the Detonation of Aluminum Suspensions in Air and in Oxygen

Борисов, А. А.; Khasainov, Boris; Saneev, E. L.; Фомин, Иван; Khomik, S. V.; Veyssiere, B.

doi:10.1007/978-94-011-3548-1_8

Cited by 25 publications

(34 citation statements)

References 4 publications

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“…(8) and (9), the total reaction rate can be calculated. For the diffusion combustion [32], the reaction rate…”

Section: Combustion Modelmentioning

confidence: 99%

“…Tulis and Selman [7] studied Al dusty detonations for flake and spherical particles, and demonstrated that the specific area is a very sensitive parameter. Borisov et al [8] examined the role of particle dimensions and noted that the parameters velocity and the pressure depend on the minimum particle scale. Zhang et al [9] investigated transverse waves in dusty detonations and calculated, using a detonation model, the minimum tube diameter for generating detonation.…”

Section: Introductionmentioning

confidence: 99%

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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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“…(8) and (9), the total reaction rate can be calculated. For the diffusion combustion [32], the reaction rate…”

Section: Combustion Modelmentioning

confidence: 99%

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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“…The effect of initial pressure increase on transition to detonation is displayed in Figures 1 and 2 by pressure records along the tube length and in Figure 3 by shock velocities averaged between two gauge locations for the 0.11lID Al-air mixtures with a dust concentration of 400 g/m 3 • Note that a dust concentration of 310 g/m 3 would be a reference point of a stoichiometric Al-air mixture assuming Ab03 and nitrogen would be the only detonation products. Owing to the strong initiation source, a shock wave is developed at 2.18 m with a shock velocity of mls at the initial pressure of Po = 1 -2.5 atm.…”

Section: Transition To Detonationmentioning

confidence: 99%

“…While micrometric aluminium dust-air detonation at atmospheric conditions is feasible in large tubes using a strong initiation source [1][2][3][4], the detonation properties and structure at elevated pressures have not been carefully investigated. For organic dust with a high volatile content, the detonation sensitivity is increased with increasing init ial pressure, approximately following the scaling rule of gaseous detonations in which the detonation cell size is inversely proportional to initial pressure [4][5].…”

Section: Introductionmentioning

confidence: 99%

Aluminium dust-air detonation at elevated pressures

2005

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“…Particle sizes ranging from 0.1 microns to 100 microns were investigated and the optimal size of Al particles was found to be about 40 microns [6]. A suspension in air of micron size Al particles supported a detonation wave in tubes [7,8]. Initiation of detonation was investigated in an explosively generated cloud of Al particles (atomized H-2 Al and Àaked Al) using 8 kg C4 explosive and detonation was observed only in the Àaked Al with 4-8 MPa peak pressures [9].…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of particulate/porous energetic materials

Nesterenko

Chiu

Braithwaite³

et al. 2012

AIP Conference Proceedings

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Abstract. Dynamic behavior of particulate/porous energetic materials in a broad range of dynamic conditions (low velocity impact and explosively driven expansion of rings) is discussed. Samples of these materials were fabricated using Cold Isostatic Pressing and Hot Isostatic Pressing with and without vacuum encapsulation. The current interest in these materials is due to the combination of their high strength and output of energy under critical conditions of mechanical deformation. They may exhibit high compressive and tensile strength with the ability to undergo bulk distributed fracture resulting in small size reactive fragments. The mechanical properties of these materials and the fragment sizes produced by fracturing are highly sensitive to mesostructure. For example, the dynamic strength of Al-W composites with fine W particles is significantly larger than the strength of composites with coarse W particles at the same porosity. The morphology of W inclusions had a strong effect on the dynamic strength and fracture pattern. Experimental results are compared with numerical data.

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On the Detonation of Aluminum Suspensions in Air and in Oxygen

Cited by 25 publications

References 4 publications

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

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

Aluminium dust-air detonation at elevated pressures

Dynamic behavior of particulate/porous energetic materials

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