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Application of Laser Techniques for Combustion Studies

Aldén, Marcus LU (1983) In Lund Reports in Atomic Physics LRAP-22.
Abstract
The aim for this work has been to increase the applicability of

laser spectroscopy techniques for studies of combustion processes,

both what regards in-flame experiments, exhaust-gas analysis

and remote sensing of the atmosphere.

Raman spectroscopy has been used for analysis of exhaust gases

from flames, model fires of wood and for inflame measurements.

Coherent anti-Stokes Raman Spectroscopy CARS, has been used for

detection of several flame constituents e.g. o2 , CO, H2o,

CH4 and H2 . Flame temperatures are measured using CARS

spectra from N2 molecules. The CARS technique has also been

used for simultaneous detection of several species e.g.... (More)
The aim for this work has been to increase the applicability of

laser spectroscopy techniques for studies of combustion processes,

both what regards in-flame experiments, exhaust-gas analysis

and remote sensing of the atmosphere.

Raman spectroscopy has been used for analysis of exhaust gases

from flames, model fires of wood and for inflame measurements.

Coherent anti-Stokes Raman Spectroscopy CARS, has been used for

detection of several flame constituents e.g. o2 , CO, H2o,

CH4 and H2 . Flame temperatures are measured using CARS

spectra from N2 molecules. The CARS technique has also been

used for simultaneous detection of several species e.g. N2/CO,

co2;o2 and CO/H2 . The applications of broadband rotational

CARS have also been demonstrated in non-flame gases, whereas

scanning rotational CARS has been used for flame experiments.

Laser-induced fluorescence LIF is especially attractive for

radical detection, and LIF spectra for several flame radicals are

presented, e.g. OH, CN, CH and c2 as well as relative

concentration profiles for different radicals as a function of

height above the burner.

Special emphasis has been paid to space-resolved detection of

radicals in flames, e.g. OH using a diode array detector. In a

refined experiment, both c2 and OH were spatially detected

using two laser systems.

Two-photon excitation is a rather new and fascinating approach

for detection of flame species that absorb in spectral regions

not accessible for laser sources. In this way oxygen atoms have

been detected in an acetylene/oxygen flame.

Closely connected to combustion studies using laser methods is

remote sensing of pollutants in the atmosphere using laser

7

techniques. These techniques have been used for laboratory

experiments and in real-world measurements. E.g., NO has been

detected using long-path absorption, whereas remote detection of

Hg atoms has been performed using the dial technique. (Less)
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supervisor
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organization
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type
Thesis
publication status
published
subject
keywords
Keywords: Laser-induced fluorescence, Raman Spectroscopy, Coherent anti-Stokes Raman Scattering (CARS), flames, laser spectroscopy, dye laser, lidar, remote sensing, combustion, air pollution, radicals, optical multichannel analyzer.
in
Lund Reports in Atomic Physics
volume
LRAP-22
pages
273 pages
defense location
n/a
defense date
1983-01-01 01:01
language
English
LU publication?
yes
id
55dc7a80-428f-499f-845e-092da75e562f (old id 2259845)
date added to LUP
2012-01-25 13:02:03
date last changed
2016-09-19 08:45:19
@misc{55dc7a80-428f-499f-845e-092da75e562f,
  abstract     = {The aim for this work has been to increase the applicability of<br/><br>
laser spectroscopy techniques for studies of combustion processes,<br/><br>
both what regards in-flame experiments, exhaust-gas analysis<br/><br>
and remote sensing of the atmosphere.<br/><br>
Raman spectroscopy has been used for analysis of exhaust gases<br/><br>
from flames, model fires of wood and for inflame measurements.<br/><br>
Coherent anti-Stokes Raman Spectroscopy CARS, has been used for<br/><br>
detection of several flame constituents e.g. o2 , CO, H2o,<br/><br>
CH4 and H2 . Flame temperatures are measured using CARS<br/><br>
spectra from N2 molecules. The CARS technique has also been<br/><br>
used for simultaneous detection of several species e.g. N2/CO,<br/><br>
co2;o2 and CO/H2 . The applications of broadband rotational<br/><br>
CARS have also been demonstrated in non-flame gases, whereas<br/><br>
scanning rotational CARS has been used for flame experiments.<br/><br>
Laser-induced fluorescence LIF is especially attractive for<br/><br>
radical detection, and LIF spectra for several flame radicals are<br/><br>
presented, e.g. OH, CN, CH and c2 as well as relative<br/><br>
concentration profiles for different radicals as a function of<br/><br>
height above the burner.<br/><br>
Special emphasis has been paid to space-resolved detection of<br/><br>
radicals in flames, e.g. OH using a diode array detector. In a<br/><br>
refined experiment, both c2 and OH were spatially detected<br/><br>
using two laser systems.<br/><br>
Two-photon excitation is a rather new and fascinating approach<br/><br>
for detection of flame species that absorb in spectral regions<br/><br>
not accessible for laser sources. In this way oxygen atoms have<br/><br>
been detected in an acetylene/oxygen flame.<br/><br>
Closely connected to combustion studies using laser methods is<br/><br>
remote sensing of pollutants in the atmosphere using laser<br/><br>
7<br/><br>
techniques. These techniques have been used for laboratory<br/><br>
experiments and in real-world measurements. E.g., NO has been<br/><br>
detected using long-path absorption, whereas remote detection of<br/><br>
Hg atoms has been performed using the dial technique.},
  author       = {Aldén, Marcus},
  keyword      = {Keywords: Laser-induced fluorescence,Raman Spectroscopy,Coherent anti-Stokes Raman Scattering (CARS),flames,laser
spectroscopy,dye laser,lidar,remote sensing,combustion,air pollution,radicals,optical multichannel analyzer.},
  language     = {eng},
  pages        = {273},
  series       = {Lund Reports in Atomic Physics},
  title        = {Application of Laser Techniques for Combustion Studies},
  volume       = {LRAP-22},
  year         = {1983},
}