Combustion of a stationary particle of low-boiling metal

Klyachko, L. A.

doi:10.1007/bf00748608

Cited by 11 publications

(2 citation statements)

References 6 publications

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“…The reaction between the condensed oxide and metal does not occur in the case of magnesium (Mg) combustion, the process that was firstly studied [7,8] and laid the foundation for other metal particle combustion models. In the case of Mg combustion, only processes related to condensation of gaseous species, i. e., the second distinction, need to be considered.…”

Section: Deficiencies In Current Concepts Of Metal Particle Combustionmentioning

confidence: 99%

Comprehending Metal Particle Combustion: a Path Forward

Altman

Pantoya

2022

Propellants Explo Pyrotec

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The paper discusses the physics required for accurate modeling of metal particle combustion and includes aspects previously neglected. Specifically, three physical phenomena are emphasized: 1) internal boiling on the condensed oxide-metal interface; 2) condense-luminescent loss during nano-oxide formation; and, 3) suppressed heat transfer on the metal particle surface due to a low energy accommodation coefficient (EAC) are essential. The last two phenomena were explored in previous work. Internal particle interface boiling detailed in the current work enables the semi-heterogeneous combustion of Al particles, an im-portant process needing attention for accurate modeling. The interface boiling mechanism allowing for the semi-heterogeneous combustion explains a number of experimental puzzles related to metal particle combustion. In particular, the semi-heterogeneous combustion justifies the coexistence of two burning regimes of Al particles (slow and fast) recently observed. Based on reported findings, revising current numerical models for metal particle combustion to include these three physical phenomena is necessary. Implications toward enhancement of energetic performance for metal-containing formulations are also discussed.

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Section: Deficiencies In Current Concepts Of Metal Particle Combustionmentioning

confidence: 99%

Comprehending Metal Particle Combustion: a Path Forward

Altman

Pantoya

2022

Propellants Explo Pyrotec

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“…Therefore, one of the key concepts serving as the basis for all studies devoted to the development of the GDS method was that the operation regime of these minireactors should be organized so as to provide vaporphase or gas-phase regimes of metal combustion. We note that, following [3,4], by vapor-phase combustion refers here to the burning of vapors of an almost boiling metal drop, and gas-phase combustion is a regime of combustion of a metal particle (liquid or solid) in which the lowest gaseous oxides are formed on the particle surface, oxidized to the highest oxide in the surface near it, and condensed therein [5].…”

Section: Introductionmentioning

confidence: 99%

Gas-disperse synthesis of metal oxide particles

Zolotko

Poletaev

Vovchuk

2015

Combust Explos Shock Waves

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The main results of years of research of metal dust flames aimed at the development of the scientific basis for the method of gas-disperse synthesis of metal oxide nanopowders are discussed. Methods of burning metal dust in oxide-containing media, the key problems of gas-disperse synthesis, and possible ways to solve these problems are considered. The ways of controlling the disperse composition of vapor-phase and gas-phase combustion products of metal particles by variation of the macroparameters of the dust flame and ionization of condensed and gaseous phases in the combustion zone with the help of adding easily ionized atoms to the fuel are analyzed. It is shown that an adequate description of condensation in a flame is impossible without consideration for the influence of electrophysical processes on nucleation and coagulation in the flame. It is established that ionization of the condensed phase is the most significant factor during coagulation of nano-oxide particles in a dust flame. This allows expecting that the influence on particle ionization may turn out to be an effective method of controlling the dispersion of the target products of gas-disperse synthesis.

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