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Application of advanced laser diagnostics for the investigation of the ionization sensor signal in a combustion bomb

Franke, Axel LU ; Koban, W; Olofsson, Jimmy LU ; Schulz, C; Bessler, W; Reinmann, R; Larsson, A and Aldén, Marcus LU (2005) In Applied Physics B 81(8). p.1135-1142
Abstract
The ionization sensor is an electrical probe for diagnostics in internal combustion engines. Laser-induced fluorescence (LIF) imaging of fuel, hydroxyl (OH), and nitric oxide (NO) distributions has been employed to extend our knowledge about the governing processes leading to its signal. By monitoring the flame propagation in quiescent and turbulent mixtures, the cycle-to-cycle variations in the early sensor signal was attributed to the stochastic contact between flame front and electrodes. An analysis of the relationship between gas temperature and sensor current in the post-flame gas suggests a dominant role of alkali traces in the ionization process at the conditions under study. Significant cooling of the burned gas in the vicinity of... (More)
The ionization sensor is an electrical probe for diagnostics in internal combustion engines. Laser-induced fluorescence (LIF) imaging of fuel, hydroxyl (OH), and nitric oxide (NO) distributions has been employed to extend our knowledge about the governing processes leading to its signal. By monitoring the flame propagation in quiescent and turbulent mixtures, the cycle-to-cycle variations in the early sensor signal was attributed to the stochastic contact between flame front and electrodes. An analysis of the relationship between gas temperature and sensor current in the post-flame gas suggests a dominant role of alkali traces in the ionization process at the conditions under study. Significant cooling of the burned gas in the vicinity of the electrodes was observed in quiescent mixtures. Imaging of the post-flame gas in turbulent combustion revealed moving structures with varying NO and OH concentrations, which were identified as sources of variation in the sensor current. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics B
volume
81
issue
8
pages
1135 - 1142
publisher
Springer
external identifiers
  • wos:000233485500018
  • scopus:28044432769
ISSN
0946-2171
DOI
10.1007/s00340-005-1969-0
language
English
LU publication?
yes
id
eb7a90cd-567f-4e80-b073-79b0197759c3 (old id 212356)
date added to LUP
2007-08-02 16:29:23
date last changed
2017-01-01 04:20:20
@article{eb7a90cd-567f-4e80-b073-79b0197759c3,
  abstract     = {The ionization sensor is an electrical probe for diagnostics in internal combustion engines. Laser-induced fluorescence (LIF) imaging of fuel, hydroxyl (OH), and nitric oxide (NO) distributions has been employed to extend our knowledge about the governing processes leading to its signal. By monitoring the flame propagation in quiescent and turbulent mixtures, the cycle-to-cycle variations in the early sensor signal was attributed to the stochastic contact between flame front and electrodes. An analysis of the relationship between gas temperature and sensor current in the post-flame gas suggests a dominant role of alkali traces in the ionization process at the conditions under study. Significant cooling of the burned gas in the vicinity of the electrodes was observed in quiescent mixtures. Imaging of the post-flame gas in turbulent combustion revealed moving structures with varying NO and OH concentrations, which were identified as sources of variation in the sensor current.},
  author       = {Franke, Axel and Koban, W and Olofsson, Jimmy and Schulz, C and Bessler, W and Reinmann, R and Larsson, A and Aldén, Marcus},
  issn         = {0946-2171},
  language     = {eng},
  number       = {8},
  pages        = {1135--1142},
  publisher    = {Springer},
  series       = {Applied Physics B},
  title        = {Application of advanced laser diagnostics for the investigation of the ionization sensor signal in a combustion bomb},
  url          = {http://dx.doi.org/10.1007/s00340-005-1969-0},
  volume       = {81},
  year         = {2005},
}