On particulate characterization in a heavy-duty diesel engine by time-resolved laser-induced incandescence

Time-resolved laser-induced incandescence (TR-LII) measurements have been performed inside the combustion chamber of a heavy-duty diesel engine running at low load and with regular diesel fuel. The LII traces were interpreted in terms of primary particle sizes, comparing two different assumed partic...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2006-06, Vol.83 (3), p.477-485
Main Authors: BOUGIE, B, GANIPPA, L. C, DAM, N. J, TER MEULEN, J. J
Format: Article
Language:English
Subjects:
Biological and medical applications
Combustion chambers
Diesel engines
Diesel fuels
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Incandescence
Lasers
Metrological applications
Optics
Physics
Pyrometry
Running
Time dependence
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Summary:Time-resolved laser-induced incandescence (TR-LII) measurements have been performed inside the combustion chamber of a heavy-duty diesel engine running at low load and with regular diesel fuel. The LII traces were interpreted in terms of primary particle sizes, comparing two different assumed particle-size distributions: a mono-disperse and a log-normal distribution. The initial temperature of the particles (immediately after the laser pulse) is estimated by two-color pyrometry. We conclude that the initial temperature of the particles is not very critical for the outcome of the fitting procedure for the (mean) radius. Under the high-pressure conditions in the engine, the time dependence of the LII intensity contains sufficient structure to allow retrieval of details of the particle-size distribution.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-006-2195-0