Laser-induced incandescence for soot particle size and volume fraction measurements using on-line extinction calibration
Axelsson, Boman LU ; Collin, Robert LU and Bengtsson, Per-Erik LU
(2001)
In Applied Physics B
72(3).
p.367-372
- Abstract
- A novel technique for two-dimensional measurements of soot volume fraction and particle size has been developed. It is based on a combined measurement of extinction and laser-induced incandescence using Nd:YAG laser wavelengths of 532 nm and 1064 nm. A low-energy laser pulse at 532 nm was used for extinction measurements and was followed by a more intense pulse at 1064 nm, delayed by 15 ns, for LII measurements. The 532-nm beam was split into a signal beam passing the flame and a reference beam, both of which were directed to a dye cell. The resulting fluorescence signals, from which the extinction was deduced, together with the LII signal, were registered on a single CCD detector. Thus the two-dimensional LII image could be converted to a... (More)
- A novel technique for two-dimensional measurements of soot volume fraction and particle size has been developed. It is based on a combined measurement of extinction and laser-induced incandescence using Nd:YAG laser wavelengths of 532 nm and 1064 nm. A low-energy laser pulse at 532 nm was used for extinction measurements and was followed by a more intense pulse at 1064 nm, delayed by 15 ns, for LII measurements. The 532-nm beam was split into a signal beam passing the flame and a reference beam, both of which were directed to a dye cell. The resulting fluorescence signals, from which the extinction was deduced, together with the LII signal, were registered on a single CCD detector. Thus the two-dimensional LII image could be converted to a soot volume fraction map through a calibration procedure during the same laser shot. The soot particle sizes were evaluated from the ratio of the temporal LII signals at two gate time positions. The uncertainty in the particle sizing arose mainly from the low signal for small particles at long gate times and the uncertainty in the flame temperature. The technique was applied to a well-characterized premixed flat flame, the soot properties of which had been previously thoroughly investigated. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4935756
- author
- Axelsson, Boman
LU
; Collin, Robert
LU
and Bengtsson, Per-Erik
LU
- organization
- publishing date
- 2001
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Applied Physics B
- volume
- 72
- issue
- 3
- pages
- 367 - 372
- publisher
- Springer
- external identifiers
-
- scopus:0034802231
- ISSN
- 0946-2171
- DOI
- 10.1007/s003400100504
- language
- English
- LU publication?
- yes
- id
- 3e36653e-e737-478e-bcbe-bc1aaf747a5c (old id 4935756)
- date added to LUP
- 2016-04-01 11:53:37
- date last changed
- 2022-04-28 21:34:02
@article{3e36653e-e737-478e-bcbe-bc1aaf747a5c,
abstract = {{A novel technique for two-dimensional measurements of soot volume fraction and particle size has been developed. It is based on a combined measurement of extinction and laser-induced incandescence using Nd:YAG laser wavelengths of 532 nm and 1064 nm. A low-energy laser pulse at 532 nm was used for extinction measurements and was followed by a more intense pulse at 1064 nm, delayed by 15 ns, for LII measurements. The 532-nm beam was split into a signal beam passing the flame and a reference beam, both of which were directed to a dye cell. The resulting fluorescence signals, from which the extinction was deduced, together with the LII signal, were registered on a single CCD detector. Thus the two-dimensional LII image could be converted to a soot volume fraction map through a calibration procedure during the same laser shot. The soot particle sizes were evaluated from the ratio of the temporal LII signals at two gate time positions. The uncertainty in the particle sizing arose mainly from the low signal for small particles at long gate times and the uncertainty in the flame temperature. The technique was applied to a well-characterized premixed flat flame, the soot properties of which had been previously thoroughly investigated.}},
author = {{Axelsson, Boman and Collin, Robert and Bengtsson, Per-Erik}},
issn = {{0946-2171}},
language = {{eng}},
number = {{3}},
pages = {{367--372}},
publisher = {{Springer}},
series = {{Applied Physics B}},
title = {{Laser-induced incandescence for soot particle size and volume fraction measurements using on-line extinction calibration}},
url = {{http://dx.doi.org/10.1007/s003400100504}},
doi = {{10.1007/s003400100504}},
volume = {{72}},
year = {{2001}},
}