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Online, spatiotemporally resolved characterization of aluminum atom puffing during the ignition of micron-sized aluminum wire

Ruan, Can LU ; Wu, Zhiyong LU orcid ; Aldén, Marcus LU and Li, Zhongshan LU (2026) In Combustion and Flame 283.
Abstract

This paper presents the first online, in-situ experimental evidence of the puffing behavior of aluminium (Al) atoms during the ignition of a micron-sized Al wire. As the protective alumina (Al2O3) layer ruptures, spatially resolved laser absorption measurements reveal the outward puffing of Al atoms from the molten Al wire core. These Al atoms then react with the surrounding oxidizers, leading to the formation of the visible Al2O3 particle condensation layer. Moreover, these Al atoms exhibit an expanding velocity that surpasses that of the impinging bulk gases, allowing them to distribute beyond the Al2O3 particle condensation layer under fuel rich conditions.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Aluminum combustion, Energy carrier, Laser absorption spectroscopy, Metal combustion
in
Combustion and Flame
volume
283
article number
114578
publisher
Elsevier
external identifiers
  • scopus:105019748344
ISSN
0010-2180
DOI
10.1016/j.combustflame.2025.114578
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 The Author(s)
id
3844b353-f6d9-4fe9-bc7a-5a5daea585d4
date added to LUP
2025-11-03 19:17:56
date last changed
2025-11-05 09:59:27
@article{3844b353-f6d9-4fe9-bc7a-5a5daea585d4,
  abstract     = {{<p>This paper presents the first online, in-situ experimental evidence of the puffing behavior of aluminium (Al) atoms during the ignition of a micron-sized Al wire. As the protective alumina (Al<sub>2</sub>O<sub>3</sub>) layer ruptures, spatially resolved laser absorption measurements reveal the outward puffing of Al atoms from the molten Al wire core. These Al atoms then react with the surrounding oxidizers, leading to the formation of the visible Al<sub>2</sub>O<sub>3</sub> particle condensation layer. Moreover, these Al atoms exhibit an expanding velocity that surpasses that of the impinging bulk gases, allowing them to distribute beyond the Al<sub>2</sub>O<sub>3</sub> particle condensation layer under fuel rich conditions.</p>}},
  author       = {{Ruan, Can and Wu, Zhiyong and Aldén, Marcus and Li, Zhongshan}},
  issn         = {{0010-2180}},
  keywords     = {{Aluminum combustion; Energy carrier; Laser absorption spectroscopy; Metal combustion}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Combustion and Flame}},
  title        = {{Online, spatiotemporally resolved characterization of aluminum atom puffing during the ignition of micron-sized aluminum wire}},
  url          = {{http://dx.doi.org/10.1016/j.combustflame.2025.114578}},
  doi          = {{10.1016/j.combustflame.2025.114578}},
  volume       = {{283}},
  year         = {{2026}},
}