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Applied Optics

Applied Optics


  • Vol. 42, Iss. 12 — Apr. 20, 2003
  • pp: 2021–2030

Size distributions of nanoscaled particles and gas temperatures from time-resolved laser-induced-incandescence measurements

Thilo Lehre, Beate Jungfleisch, Rainer Suntz, and Henning Bockhorn  »View Author Affiliations

Applied Optics, Vol. 42, Issue 12, pp. 2021-2030 (2003)

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Laser-induced-incandescence (LII) signal decays are measured in sooting premixed atmospheric and low-pressure flames. Soot particle temperatures are obtained from LII signals measured at two wavelengths. Soot particle size distributions P(r) and flame temperatures T are measured spatially resolved by independent techniques. Heat and mass transfer kinetics of the LII process are determined from measured soot particle temperatures, flame temperatures, and particle sizes. Uncertainties of current LII models are attributed to processes during the absorption of the laser pulse. Implications for LII experiments are made in order to obtain primary soot particle sizes. Soot particle size distributions and flame temperatures are assessed from measured particle temperature decays by use of multi-D nonlinear regression.

© 2003 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.6780) Instrumentation, measurement, and metrology : Temperature
(190.4870) Nonlinear optics : Photothermal effects
(280.1100) Remote sensing and sensors : Aerosol detection
(300.0300) Spectroscopy : Spectroscopy

Original Manuscript: May 10, 2002
Revised Manuscript: September 12, 2002
Published: April 20, 2003

Thilo Lehre, Beate Jungfleisch, Rainer Suntz, and Henning Bockhorn, "Size distributions of nanoscaled particles and gas temperatures from time-resolved laser-induced-incandescence measurements," Appl. Opt. 42, 2021-2030 (2003)

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