Spatially resolved measurements of soot volume fraction using laser-induced incandescence

B. Quay, Taewoo Lee, T. Ni, R. J. Santoro

Research output: Contribution to journalArticle

224 Citations (Scopus)

Abstract

Laser-induced incandescence is used to obtain spatially resolved measurements of soot volume fraction in a laminar diffusion flame, in which comparisons with laser scattering/extinction data yield excellent agreement. In addition, the laser-induced incandescence signal is observed to involve a rapid rise in intensity followed by a relatively long (ca. 600 ns) decay period subsequent to the laser pulse, while the effect of laser fluence is manifest in nonlinear and near-saturated response of the laser-induced incandescence signal with the transition occurring at a laser fluence of approximately 1.2 × 108 W/cm2. Spectral response of the laser-induced incandescence involves a continuous spectrum in the visible wavelength range due to the blackbody nature of the emission. Simultaneous measurements of laser-induced incandescence and light scattering yield encouraging results concerning the mean soot particle diameter and number concentration. Thus, laser-induced incandescence can be used as an instantaneous, spatially resolved diagnostic of soot volume fraction without the need for the conventional line-of-sight laser extinction method, while potential applications in two-dimensional imaging and simultaneous measurements of laser-induced incandescence and light-scattering to generate a complete soot property characterization are significant.

Original languageEnglish (US)
Pages (from-to)384-392
Number of pages9
JournalCombustion and Flame
Volume97
Issue number3-4
DOIs
StatePublished - 1994
Externally publishedYes

Fingerprint

incandescence
Soot
soot
Volume fraction
Lasers
lasers
Light scattering
fluence
extinction
light scattering
diffusion flames
continuous spectra
spectral sensitivity
scattering
Laser pulses
line of sight

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Mechanical Engineering

Cite this

Spatially resolved measurements of soot volume fraction using laser-induced incandescence. / Quay, B.; Lee, Taewoo; Ni, T.; Santoro, R. J.

In: Combustion and Flame, Vol. 97, No. 3-4, 1994, p. 384-392.

Research output: Contribution to journalArticle

Quay, B. ; Lee, Taewoo ; Ni, T. ; Santoro, R. J. / Spatially resolved measurements of soot volume fraction using laser-induced incandescence. In: Combustion and Flame. 1994 ; Vol. 97, No. 3-4. pp. 384-392.
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