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On the dependence of the laser-induced incandescence (LII) signal on soot volume fraction for variations in particle size

Bladh, Henrik LU ; Johnsson, Jonathan LU and Bengtsson, Per-Erik LU (2008) In Applied Physics B: Lasers and Optics 90(1). p.109-125
Abstract
“The laser-induced incandescence (LII) signal is proportional to soot volume fraction” is an often used statement in scientific papers, and it has – within experimental uncertainties – been validated in comparisons with other diagnostic techniques in several investigations. In 1984 it was shown theoretically in a paper by Melton that there is a deviation from this

statement in that the presence of larger particles leads to some overestimation of soot volume fractions. In the present paper we present a detailed theoretical investigation of how the soot particle size influences the relationship between LII signal and soot volume fraction for different experimental conditions. Several

parameters have been varied; detection... (More)
“The laser-induced incandescence (LII) signal is proportional to soot volume fraction” is an often used statement in scientific papers, and it has – within experimental uncertainties – been validated in comparisons with other diagnostic techniques in several investigations. In 1984 it was shown theoretically in a paper by Melton that there is a deviation from this

statement in that the presence of larger particles leads to some overestimation of soot volume fractions. In the present paper we present a detailed theoretical investigation of how the soot particle size influences the relationship between LII signal and soot volume fraction for different experimental conditions. Several

parameters have been varied; detection wavelength, time and delay of detection gate, ambient gas temperature and pressure, laser fluence, level of aggregation and spatial profile. Based on these results we are able, firstly, to understand how experimental conditions should be chosen in order to minimize the errors introduced when assuming a linear dependence between the signal and volume fraction and secondly, to obtain knowledge on how to use this information to obtain more accurate soot volume fraction data if the particle size is known. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Laser-induced incandescence Soot diagnostics Heat and mass transfer model
in
Applied Physics B: Lasers and Optics
volume
90
issue
1
pages
109 - 125
publisher
Springer
external identifiers
  • WOS:000251640700016
  • Scopus:37549021160
DOI
10.1007/s00340-007-2826-0
language
English
LU publication?
yes
id
1e865356-3240-47b0-b199-046f9e2e47d9 (old id 739503)
date added to LUP
2007-12-18 14:04:50
date last changed
2016-12-04 04:48:29
@misc{1e865356-3240-47b0-b199-046f9e2e47d9,
  abstract     = {“The laser-induced incandescence (LII) signal is proportional to soot volume fraction” is an often used statement in scientific papers, and it has – within experimental uncertainties – been validated in comparisons with other diagnostic techniques in several investigations. In 1984 it was shown theoretically in a paper by Melton that there is a deviation from this<br/><br>
statement in that the presence of larger particles leads to some overestimation of soot volume fractions. In the present paper we present a detailed theoretical investigation of how the soot particle size influences the relationship between LII signal and soot volume fraction for different experimental conditions. Several<br/><br>
parameters have been varied; detection wavelength, time and delay of detection gate, ambient gas temperature and pressure, laser fluence, level of aggregation and spatial profile. Based on these results we are able, firstly, to understand how experimental conditions should be chosen in order to minimize the errors introduced when assuming a linear dependence between the signal and volume fraction and secondly, to obtain knowledge on how to use this information to obtain more accurate soot volume fraction data if the particle size is known.},
  author       = {Bladh, Henrik and Johnsson, Jonathan and Bengtsson, Per-Erik},
  keyword      = {Laser-induced incandescence
Soot diagnostics
Heat and mass transfer model},
  language     = {eng},
  number       = {1},
  pages        = {109--125},
  publisher    = {ARRAY(0xa0650b8)},
  series       = {Applied Physics B: Lasers and Optics},
  title        = {On the dependence of the laser-induced incandescence (LII) signal on soot volume fraction for variations in particle size},
  url          = {http://dx.doi.org/10.1007/s00340-007-2826-0},
  volume       = {90},
  year         = {2008},
}