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Laser-induced incandescence for soot-particle sizing at elevated pressure.
- Source :
-
Applied Physics B: Lasers & Optics . Mar2008, Vol. 90 Issue 3/4, p629-639. 11p. 3 Diagrams, 2 Charts, 8 Graphs. - Publication Year :
- 2008
-
Abstract
- This paper describes the applicability of laser-induced incandescence (LII) as a measurement technique for primary soot particle sizes at elevated pressure. A high-pressure burner was constructed that provides stable, laminar, sooting, premixed ethylene/air flames at 1–10 bar. An LII model was set up that includes different heat-conduction sub-models and used an accommodation coefficient of 0.25 for all pressures studied. Based on this model experimental time-resolved LII signals recorded at different positions in the flame were evaluated with respect to the mean particle diameter of a log-normal particle-size distribution. The resulting primary particle sizes were compared to results from TEM images of soot samples that were collected thermophoretically from the high-pressure flame. The LII results are in good agreement with the mean primary particle sizes of a log-normal particle-size distribution obtained from the TEM-data for all pressures, if the LII signals are evaluated with the heat-conduction model of Fuchs combined with an aggregate sub-model that describes the reduced heat conduction of aggregated primary soot particles. The model, called LIISim, is available online via a web interface. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LASERS
*SOOT
*INCANDESCENT lamps
*PARTICLES
*ETHYLENE
Subjects
Details
- Language :
- English
- ISSN :
- 09462171
- Volume :
- 90
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Applied Physics B: Lasers & Optics
- Publication Type :
- Academic Journal
- Accession number :
- 30104548
- Full Text :
- https://doi.org/10.1007/s00340-007-2877-2