Laser-induced incandescence calibration via gravimetric sampling

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · Combustion and Flame

DOI:https://doi.org/10.1016/0010-2180(95)00216-2· OSTI ID:251084

Vander Wal, R L ^[1]; Zhou, Z; Choi, M Y ^[2]

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1. NYMA, Inc., Brook Park, OH (United States)
2. Univ. of Illinois, Chicago, IL (United States). Dept. of Mechanical Engineering

Absolute calibration of laser-induced incandescence (LII) is demonstrated via comparison of LII signal intensities with gravimetrically determined soot volume fractions. This calibration technique does not rely upon calculated or measured optical characteristics of soot. The variation of the LII signal with gravimetrically measured soot volume fractions ranging from 0.078 to 1.1 ppm established the linearly of the calibration. With the high spatial and temporal resolution capabilities of LII, the spatial and temporal fluctuations of the soot field within a gravimetric chimney were characterized. Radial uniformity of the soot volume fraction, f{sub v}, was demonstrated with sufficient averaging of the single laser-shot LII images of the soot field thus confirming the validity of the calibration method for imaging applications. As illustration, instantaneous soot volume fractions within a Re = 5,000 ethylene/air diffusion flame measured via planar LII were established quantitatively with this calibration.

• OSTI ID: 251084
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 4 Vol. 105; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
40 CHEMISTRY
CALIBRATION
COMBUSTION
EMISSION SPECTROSCOPY
ETHYLENE
GRAVIMETRIC ANALYSIS
INHIBITION
LASER RADIATION
LASER SPECTROSCOPY
SOOT