Combustion of Large Monolithic Titanium Particles in Air. I. Experimental Techniques, Burning Time and Fragmentation Modes

Глотов, О. Г.; Belousova, N. S.; Surodin, G. S.

doi:10.1134/s0010508221060034

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…It is this bimodal distribution of the burn time that has led us to the conclusion of the coexistence of two different regimes of Al particle combustion [13]. Note that our observation of the bimodal burn time distribution is not isolated, although researchers just do not pay close attention to its occurrence [17,18].…”

Section: Burn Time Of Metal Particles: What We Really Get From Experi...mentioning

confidence: 73%

“…The other important consequence of boiling on the condensed oxide‐metal interface at temperatures below the metal boiling point is that the corresponding mechanism of internal boiling can potentially explain observations of particle inflation and micro‐explosions observed during metal combustion [18, 39, 40]. We will address this in future work.…”

Section: Insight Into Semi‐heterogeneous Al Combustionmentioning

confidence: 96%

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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: Burn Time Of Metal Particles: What We Really Get From Experi...mentioning

confidence: 73%

Section: Insight Into Semi‐heterogeneous Al Combustionmentioning

confidence: 96%