Study of the structure of agglomerates with combustion of aluminized mixed condensed systems

Babuk, V. A.; Belov, V. P.; Khodosov, V. V.; Shelukhin, G. G.

doi:10.1007/bf00755493

Cited by 18 publications

(8 citation statements)

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“…(23)]. This completely agrees with the data of [8,[23][24][25]. Thus, the model proposed resolves the contradiction between the data of different authors who observed the opposite dependences of the mean-mass size of agglomerates on pressure.…”

Section: Computation Methods and Simulation Resultssupporting

confidence: 90%

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Statistical simulation of aluminum agglomeration during combustion of heterogeneous condensed mixtures

Rashkovskii

2005

Combust Explos Shock Waves

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A statistical model of aluminum agglomeration during combustion of solid composite rocket propellants is considered; the model describes the process dynamics, beginning from propellant heating in the combustion wave and ending by separation of agglomerates from the burning surface. An algorithm of computing the agglomeration process by the Monte Carlo method is proposed. A series of computations of aluminum agglomeration is performed; the density distribution functions for agglomerate sizes are derived; the dependence of the mean-mass size of agglomerates on the mean-mass size of ammonium-perchlorate particles is determined. The model proposed predicts power dependences of the mean-mass size of agglomerates on pressure and burning rate, which agrees with available experimental data.

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Section: Computation Methods and Simulation Resultssupporting

confidence: 90%

“…The model also makes it possible to explain why the mean-mass diameter of agglomerates is independent of pressure, which is observed in the high-pressure region for some HCSs and in the low-pressure region for other HCSs [23,25].…”

Section: Computation Methods and Simulation Resultsmentioning

confidence: 99%

Statistical simulation of aluminum agglomeration during combustion of heterogeneous condensed mixtures

Rashkovskii

2005

Combust Explos Shock Waves

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“…This correlates to the results of observations over real CSP combustion (Grigor'ev et al, 1981;Babuk et al, 1988 andBabuk et al, 1985).…”

Section: Models Of Collisions Agglomerate-sub-agglomeratesupporting

confidence: 89%

“…Analysis of photos of the surface of burning CSP (Babuk et al, 1988) shows, that agglomerates concentration on the burning surface is high enough and there is a higher probability of a sub-agglomerate colliding several agglomerates at once. In this case, a sub-agglomerate connects several agglomerates, which further merge into a single bigger particle under the action of surface-tension.…”

Section: Models Of Collisions Agglomerate-sub-agglomeratementioning

confidence: 98%

Metal Agglomeration in Solid Propellants Combustion

Rashkovsky¹

1998

GCST

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This article is a continuation of the work (Rashkovsky, 1998).The solution method of equation of metal agglomeration in solid propellants combustion theory is suggested. It is based on statistical tests method (Monte Carlo method). Different agglomeration mechanisms have been investigated and agglomerates probability density function for different ammonium perchlorate (AP) particles spectra have been obtained, as well as dependencies of average mass agglomerates diameter upon average mass diameter of AP particles. It is shown, that mass agglomerates distribution is of polymodal nature, which corresponds to known experimental data. Effect of different factors on agglomerates dispersity has been investigated. This paper includes analysis of different calculated schemes. Besides, the peculiarities of Monte Carlo method applying and common recommendations, necessary for making new calculation models of the metal agglomeration process in composite solid propellants combustion are considered. The effect of different process parameters on the agglomeration intensity are investigated.

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“…Babuk [18] suggested a "skeletal layer" as the agglomeration process starting point. He considered a partially decomposed carbonaceous binder consisting of aluminum, aluminum oxide, and perhaps some fine AP.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Agglomeration Phenomena in Combustion of Aluminized Composite Solid Propellant

Yavor

Gany

Beckstead

2013

Propellants Explo Pyrotec

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A theoretical model was developed in order to predict the size of agglomerates ejected from aluminized composite solid propellants. The model accounts for aspects of both mechanistic and geometric approaches. A thin mobile surface layer is assumed to dominate particle accumulation. Agglomeration number N ag expressing the ratio between ignition and accumulation times, was found to greatly affect the characteristics of agglomeration phenomena, as noted in previous works. The concept of a characteristic distance D e of the mobile surface layer was introduced, depending mostly on coarse AP particle diameter and loading. It was found to have a significant effect on the resulting agglomerate diameter. An agglomeration threshold was defined as the particle diameter equal to the mobile layer thickness. Particles smaller than this threshold have shown tendency to form large agglomerates, whereas particles with a somewhat larger diameter have demonstrated faster ignition and smaller ejected agglomerates. Model predictions for a number of propellant compositions showed good agreement with other theoretical studies as well as with experimental results.

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Study of the structure of agglomerates with combustion of aluminized mixed condensed systems

Cited by 18 publications

References 0 publications

Statistical simulation of aluminum agglomeration during combustion of heterogeneous condensed mixtures

Statistical simulation of aluminum agglomeration during combustion of heterogeneous condensed mixtures

Metal Agglomeration in Solid Propellants Combustion

Modeling of the Agglomeration Phenomena in Combustion of Aluminized Composite Solid Propellant

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