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Simultaneous single-shot imaging of H and O atoms in premixed turbulent flames using femtosecond two-photon laser-induced fluorescence

Ruchkina, Maria LU ; Raveesh, Meena LU ; Dominguez, Armand LU ; Bood, Joakim LU and Brackmann, Christian LU (2023) In Optics Express 31(8). p.12932-12943
Abstract

A method based on femtosecond two-photon excitation has been developed for simultaneous visualization of interference-free fluorescence of H and O atoms in turbulent flames. This work shows pioneering results on single-shot simultaneous imaging of these radicals under non-stationary flame conditions. The fluorescence signal, showing the distribution of H and O radicals in premixed CH4/O2 flames was investigated for equivalence ratios ranging from ϕ = 0.8 to ϕ = 1.3. The images have been quantified through calibration measurements and indicate single-shot detection limits on the order of a few percent. Experimental profiles have also been compared with profiles from flame simulations, showing similar trends.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Express
volume
31
issue
8
pages
12 pages
publisher
Optical Society of America
external identifiers
  • scopus:85152483939
  • pmid:37157442
ISSN
1094-4087
DOI
10.1364/OE.479562
language
English
LU publication?
yes
id
c10a60dd-b555-481e-b453-68467f4c2a8f
date added to LUP
2023-08-01 15:58:39
date last changed
2025-11-03 03:13:11
@article{c10a60dd-b555-481e-b453-68467f4c2a8f,
  abstract     = {{<p>A method based on femtosecond two-photon excitation has been developed for simultaneous visualization of interference-free fluorescence of H and O atoms in turbulent flames. This work shows pioneering results on single-shot simultaneous imaging of these radicals under non-stationary flame conditions. The fluorescence signal, showing the distribution of H and O radicals in premixed CH<sub>4</sub>/O<sub>2</sub> flames was investigated for equivalence ratios ranging from ϕ = 0.8 to ϕ = 1.3. The images have been quantified through calibration measurements and indicate single-shot detection limits on the order of a few percent. Experimental profiles have also been compared with profiles from flame simulations, showing similar trends.</p>}},
  author       = {{Ruchkina, Maria and Raveesh, Meena and Dominguez, Armand and Bood, Joakim and Brackmann, Christian}},
  issn         = {{1094-4087}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{8}},
  pages        = {{12932--12943}},
  publisher    = {{Optical Society of America}},
  series       = {{Optics Express}},
  title        = {{Simultaneous single-shot imaging of H and O atoms in premixed turbulent flames using femtosecond two-photon laser-induced fluorescence}},
  url          = {{http://dx.doi.org/10.1364/OE.479562}},
  doi          = {{10.1364/OE.479562}},
  volume       = {{31}},
  year         = {{2023}},
}