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Soot volume fraction measurements in aero-engine exhausts using extinction-calibrated backward laser-induced incandescence

Delhay, J.; Desgroux, P.; Therssen, E.; Bladh, Henrik LU ; Bengtsson, P. -E.; Hoenen, H.; Black, J. D. and Vallet, I. (2009) In Applied Physics B 95(4). p.825-838
Abstract
Control and reduction of soot particle emissions from aeronautic turbines requires a monitoring system suitable for quantification of these emissions. Currently, such emissions are estimated using the technique of smoke number. This is an extractive method, which is not sensitive enough for the low emission levels of modern gas turbines. Within a recent European project, AEROTEST, part of the project aimed at investigating an alternative soot monitoring technique, laser-induced incandescence (LII) as an in-situ optical diagnostic for quantification of soot emissions. For aero-engine applications, especially those involving large-scale turbines, it is necessary to perform the measurements at long distance from the turbine. The LII technique... (More)
Control and reduction of soot particle emissions from aeronautic turbines requires a monitoring system suitable for quantification of these emissions. Currently, such emissions are estimated using the technique of smoke number. This is an extractive method, which is not sensitive enough for the low emission levels of modern gas turbines. Within a recent European project, AEROTEST, part of the project aimed at investigating an alternative soot monitoring technique, laser-induced incandescence (LII) as an in-situ optical diagnostic for quantification of soot emissions. For aero-engine applications, especially those involving large-scale turbines, it is necessary to perform the measurements at long distance from the turbine. The LII technique is favourable in this respect as it provides for non-intrusive measurements and, by detecting the isotropic LII signal along the same axis as the incoming laser beam (so called backward LII), both the laser and the detector can be built inside one system located several meters from the turbine. The concept was initiated in the previous European projects, AEROJET I and II. This paper describes the modified version of the system and the procedure developed to achieve reliable and quantitative soot volume fraction measurements in the exhausts of aero-engines. Application of the backward LII technique is demonstrated in the exhaust of a military turbojet engine for different engine speeds. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics B
volume
95
issue
4
pages
825 - 838
publisher
Springer
external identifiers
  • wos:000266073200027
  • scopus:67349118438
ISSN
0946-2171
DOI
10.1007/s00340-009-3534-8
language
English
LU publication?
yes
id
2d2c16da-8a9f-4e48-a874-cffc1d24c6e6 (old id 1426261)
date added to LUP
2009-06-30 11:57:07
date last changed
2017-05-28 03:32:59
@article{2d2c16da-8a9f-4e48-a874-cffc1d24c6e6,
  abstract     = {Control and reduction of soot particle emissions from aeronautic turbines requires a monitoring system suitable for quantification of these emissions. Currently, such emissions are estimated using the technique of smoke number. This is an extractive method, which is not sensitive enough for the low emission levels of modern gas turbines. Within a recent European project, AEROTEST, part of the project aimed at investigating an alternative soot monitoring technique, laser-induced incandescence (LII) as an in-situ optical diagnostic for quantification of soot emissions. For aero-engine applications, especially those involving large-scale turbines, it is necessary to perform the measurements at long distance from the turbine. The LII technique is favourable in this respect as it provides for non-intrusive measurements and, by detecting the isotropic LII signal along the same axis as the incoming laser beam (so called backward LII), both the laser and the detector can be built inside one system located several meters from the turbine. The concept was initiated in the previous European projects, AEROJET I and II. This paper describes the modified version of the system and the procedure developed to achieve reliable and quantitative soot volume fraction measurements in the exhausts of aero-engines. Application of the backward LII technique is demonstrated in the exhaust of a military turbojet engine for different engine speeds.},
  author       = {Delhay, J. and Desgroux, P. and Therssen, E. and Bladh, Henrik and Bengtsson, P. -E. and Hoenen, H. and Black, J. D. and Vallet, I.},
  issn         = {0946-2171},
  language     = {eng},
  number       = {4},
  pages        = {825--838},
  publisher    = {Springer},
  series       = {Applied Physics B},
  title        = {Soot volume fraction measurements in aero-engine exhausts using extinction-calibrated backward laser-induced incandescence},
  url          = {http://dx.doi.org/10.1007/s00340-009-3534-8},
  volume       = {95},
  year         = {2009},
}