Laser-induced incandescence (LII) measurements carried out in aerosols having a large particle volume fraction must be corrected to account for extinction between the energized aerosol particles and the detector, called signal trapping. While standard correction techniques have been developed for signal trapping by absorption, the effect of scattering on LII measurements requires further investigation, particularly the case of highly anisotropic scattering and along a path of relatively large optical thickness. This paper examines this phenomenon in an aerosol containing highly aggregated soot particles by simulating LII signals using a backward Monte Carlo analysis; these signals are then used to recover the soot particle temperature and soot volume fraction. The results show that inscattered radiation is a substantial component of the LII signal under high soot loading conditions, which can strongly influence properties derived from these measurements. Correction techniques based on Bouguer’s law are shown to be effective in mitigating the effect of scatter on the LII signals.
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e-mail: kjdaun@mme.uwaterloo.ca
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November 2008
This article was originally published in
Journal of Heat Transfer
Research Papers
Simulation of Laser-Induced Incandescence Measurements in an Anisotropically Scattering Aerosol Through Backward Monte Carlo
K. J. Daun,
K. J. Daun
Institute for Chemical Process and Environmental Technology,
e-mail: kjdaun@mme.uwaterloo.ca
National Research Council of Canada
, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
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K. A. Thomson,
K. A. Thomson
Institute for Chemical Process and Environmental Technology,
National Research Council of Canada
, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
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F. Liu
F. Liu
Institute for Chemical Process and Environmental Technology,
National Research Council of Canada
, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
Search for other works by this author on:
K. J. Daun
Institute for Chemical Process and Environmental Technology,
National Research Council of Canada
, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canadae-mail: kjdaun@mme.uwaterloo.ca
K. A. Thomson
Institute for Chemical Process and Environmental Technology,
National Research Council of Canada
, 1200 Montreal Road, Ottawa, ON, K1A 0R6, Canada
F. Liu
Institute for Chemical Process and Environmental Technology,
National Research Council of Canada
, 1200 Montreal Road, Ottawa, ON, K1A 0R6, CanadaJ. Heat Transfer. Nov 2008, 130(11): 112701 (10 pages)
Published Online: August 29, 2008
Article history
Received:
August 28, 2007
Revised:
November 27, 2007
Published:
August 29, 2008
Citation
Daun, K. J., Thomson, K. A., and Liu, F. (August 29, 2008). "Simulation of Laser-Induced Incandescence Measurements in an Anisotropically Scattering Aerosol Through Backward Monte Carlo." ASME. J. Heat Transfer. November 2008; 130(11): 112701. https://doi.org/10.1115/1.2955468
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