# Mid-infrared laser absorption tomography for quantitative 2D thermochemistry measurements in premixed jet flames

Mid-infrared laser absorption tomography for quantitative 2D thermochemistry measurements in... A tomographic laser absorption spectroscopy technique, utilizing mid-infrared light sources, is presented as a quantitative method to spatially resolve species and temperature profiles in small-diameter reacting flows relevant to combustion systems. Here, tunable quantum and interband cascade lasers are used to spectrally resolve select rovibrational transitions near 4.98 and 4.19  $$\upmu$$ μ m to measure CO and $${\mathrm{CO}_{2}}$$ CO 2 , respectively, as well as their vibrational temperatures, in piloted premixed jet flames. Signal processing methods are detailed for the reconstruction of axial and radial profiles of thermochemical structure in a canonical ethylene–air jet flame. The method is further demonstrated to quantitatively distinguish between different turbulent flow conditions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Physics B Springer Journals

# Mid-infrared laser absorption tomography for quantitative 2D thermochemistry measurements in premixed jet flames

, Volume 124 (6) – May 30, 2018
12 pages

/lp/springer_journal/mid-infrared-laser-absorption-tomography-for-quantitative-2d-sDq2AXaFWX
Publisher
Springer Journals
Subject
Physics; Physics, general; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices; Quantum Optics; Engineering, general
ISSN
0946-2171
eISSN
1432-0649
D.O.I.
10.1007/s00340-018-6984-z
Publisher site
See Article on Publisher Site

### Abstract

A tomographic laser absorption spectroscopy technique, utilizing mid-infrared light sources, is presented as a quantitative method to spatially resolve species and temperature profiles in small-diameter reacting flows relevant to combustion systems. Here, tunable quantum and interband cascade lasers are used to spectrally resolve select rovibrational transitions near 4.98 and 4.19  $$\upmu$$ μ m to measure CO and $${\mathrm{CO}_{2}}$$ CO 2 , respectively, as well as their vibrational temperatures, in piloted premixed jet flames. Signal processing methods are detailed for the reconstruction of axial and radial profiles of thermochemical structure in a canonical ethylene–air jet flame. The method is further demonstrated to quantitatively distinguish between different turbulent flow conditions.

### Journal

Applied Physics BSpringer Journals

Published: May 30, 2018

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