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Received: 2009-07-14

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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.9 P.1320-1326


A 3D numerical simulation of laser-induced incandescence of soot particles in coal combustion products

Author(s):  Ling-hong CHEN, Ke-fa CEN, Annie GARO, Gé,rard GREHAN

Affiliation(s):  State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   chenlh@zju.edu.cn

Key Words:  Laser-induced incandescence (LII), Soot, Fly-ash, 3D Monte Carlo, Scattering, Absorption

Ling-hong CHEN, Ke-fa CEN, Annie GARO, Gérard GREHAN. A 3D numerical simulation of laser-induced incandescence of soot particles in coal combustion products[J]. Journal of Zhejiang University Science A, 2009, 10(9): 1320-1326.

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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0930003

T1 - A 3D numerical simulation of laser-induced incandescence of soot particles in coal combustion products
A1 - Ling-hong CHEN
A1 - Ke-fa CEN
A1 - Annie GARO
A1 - Gé
A1 - rard GREHAN
J0 - Journal of Zhejiang University Science A
VL - 10
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%@ 1673-565X
Y1 - 2009
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0930003

laser-induced incandescence (LII) has received increasing attention as a potentially powerful technique for in-situ measuring of the volume fraction and primary size of soot particles in combustion systems. In this study, a 3D Monte Carlo simulation combined with a Mie equation was developed to analyze the influence of spectral absorption and scattering on the measured LII flux emitted by soot particles. This paper represents a first attempt to analyze soot measurement using the LII technique in coal combustion products. The combustion products of gases (CO2, N2), soot, and fly-ash particles, present between the location of laser-excited soot and the LII flux receiver. The simulation results indicated that an almost Beer-Lambert exponential decrease in LII flux occurred with an increase in the volume fraction of soot particles, while a nearly linear decrease occurred with an increase in the volume fraction of fly-ash particles. The results also showed that scattering effects of both soot and fly-ash particles on the LII flux could be neglected. Compared with the absorption of gases, a decrease of 20% of LII flux was observed with soot particles, and a decrease of 10% with fly-ash particles.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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