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Article
Influence of soot aggregate structure on particle sizing using laser-induced incandescence: importance of bridging between primary particles
Soot aggregates formed in combustion processes are often described as clusters of carbonaceous particles in random fractal structures. For theoretical studies of the physical properties of such aggregates, the...
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Article
Influence of soot particle aggregation on time-resolved laser-induced incandescence signals
Laser-induced incandescence (LII) is a versatile technique for quantitative soot measurements in flames and exhausts. When used for particle sizing, the time-resolved signals are analysed as these will show a ...
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Article
On the influence of bimodal size distributions in particle sizing using laser-induced incandescence
Time-resolved laser-induced incandescence (LII) is a technique for in-situ soot particle size distribution measurements with the limitation that the distribution function has to be assumed (often monodisperse ...
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Article
Influence of spatial laser energy distribution on evaluated soot particle sizes using two-colour laser-induced incandescence in a flat premixed ethylene/air flame
Time-resolved laser-induced incandescence (LII) has been developed rapidly during the last decade as a useful non-intrusive technique for particle size determination. Still several parameters should be investi...
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Article
Soot volume fraction measurements in aero-engine exhausts using extinction-calibrated backward laser-induced incandescence
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 techniqu...
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Article
On the dependence of the laser-induced incandescence (LII) signal on soot volume fraction for variations in particle size
“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 compar...
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Article
Modeling laser-induced incandescence of soot: a summary and comparison of LII models
We have performed a comparison of ten models that predict the temporal behavior of laser-induced incandescence (LII) of soot. In this paper we present a summary of the models and comparisons of calculated temp...
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Article
Experimental and theoretical comparison of spatially resolved laser-induced incandescence (LII) signals of soot in backward and right-angle configuration
In-situ measurements of soot volume fraction in the exhausts of jet engines can be carried out using the laser-induced incandescence (LII) technique in backward configuration, in which the signal is detected i...
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Article
Characteristics of laser-induced incandescence from soot in studies of a time-dependent heat- and mass-transfer model
The temporal behavior of the laser-induced incandescence (LII) signal is often used for soot-particle sizing, which is possible because the cooling behavior of a laser-heated particle is dependent on the parti...
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Article
Soot visualisation by use of laser-induced soot vapourisation in combination with polarisation spectroscopy
A novel approach to the visualisation of soot is presented. It relies on a combination of laser-induced soot vapourisation and consecutive polarisation spectroscopy. Upon soot vapourisation, molecular fragment...