Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

A calibration-independent laser-induced incandescence technique for soot measurement by detecting absolute light intensity

Not Accessible

Your library or personal account may give you access

Abstract

Laser-induced incandescence (LII) has proved to be a useful diagnostic tool for spatially and temporally resolved measurement of particulate (soot) volume fraction and primary particle size in a wide range of applications, such as steady flames, flickering flames, and Diesel engine exhausts. We present a novel LII technique for the determination of soot volume fraction by measuring the absolute incandescence intensity, avoiding the need for ex situ calibration that typically uses a source of particles with known soot volume fraction. The technique developed in this study further extends the capabilities of existing LII for making practical quantitative measurements of soot. The spectral sensitivity of the detection system is determined by calibrating with an extended source of known radiance, and this sensitivity is then used to interpret the measured LII signals. Although it requires knowledge of the soot temperature, either from a numerical model of soot particle heating or experimentally determined by detecting LII signals at two different wavelengths, this technique offers a calibration-independent procedure for measuring soot volume fraction. Application of this technique to soot concentration measurements is demonstrated in a laminar diffusion flame.

© 2005 Optical Society of America

Full Article  |  PDF Article
More Like This
Two-color laser-induced incandescence (2C-LII) technique for absolute soot volume fraction measurements in flames

Silvana De Iuliis, Francesco Cignoli, and Giorgio Zizak
Appl. Opt. 44(34) 7414-7423 (2005)

Assessment of soot particle vaporization effects during laser-induced incandescence with time-resolved light scattering

Gregory D. Yoder, Prasoon K. Diwakar, and David W. Hahn
Appl. Opt. 44(20) 4211-4219 (2005)

Laser-induced incandescence for soot diagnostics at high pressures

Max Hofmann, Wolfgang G. Bessler, Christof Schulz, and Helga Jander
Appl. Opt. 42(12) 2052-2062 (2003)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (19)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved