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Mid-Infrared Polarization Spectroscopy Measurements of Species Concentrations and Temperature in a Low-Pressure Flame

Sahlberg, Anna-Lena LU ; Hot, Dina LU ; Lyngbye Pedersen, Rasmus LU ; Zhou, Jianfeng LU ; Aldén, Marcus LU and Li, Zhongshan LU (2019) In Applied Spectroscopy 73(6). p.653-664
Abstract (Swedish)
Quantitative measurements of CH4 mole fractions at different HAB in the flame were realized by a calibration measurement in a low pressure gas flow of N2 with a small admixture of known amount of CH4. A comprehensive study of the collision effects on the IRPS signal was performed in order to quantify the flame measurement. The concentration and temperature measurements were found to agree reasonably well with simulations using Chemkin. These measurements We demonstrate quantitative measurements of CH4 mole fractions in a low pressure fuel-rich premixed dimethyl ether/oxygen/argon flat flame (Φ =1.87, 37 mbar) using mid-infrared polarization spectroscopy (IRPS). Non-intrusive in situ detection of... (More)
Quantitative measurements of CH4 mole fractions at different HAB in the flame were realized by a calibration measurement in a low pressure gas flow of N2 with a small admixture of known amount of CH4. A comprehensive study of the collision effects on the IRPS signal was performed in order to quantify the flame measurement. The concentration and temperature measurements were found to agree reasonably well with simulations using Chemkin. These measurements We demonstrate quantitative measurements of CH4 mole fractions in a low pressure fuel-rich premixed dimethyl ether/oxygen/argon flat flame (Φ =1.87, 37 mbar) using mid-infrared polarization spectroscopy (IRPS). Non-intrusive in situ detection of CH4, C2H2 and C2H6 in the flame was realized by probing the fundamental asymmetric C-H stretching vibration bands in the respective molecules in the spectral range 2970-3340 cm-1. The flame was stabilized on a McKenna-type porous plug burner hosted in a low pressure chamber. The temperature at different heights above the burner (HAB) was measured from the line ratio of temperature sensitive H2O spectral lines recorded using IRPS. prove the potential of IRPS as a sensitive, non-intrusive, in situ technique in low pressure flames. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Spectroscopy
volume
73
issue
6
pages
653 - 664
publisher
Society for Applied Spectroscopy
external identifiers
  • scopus:85063579683
ISSN
1943-3530
DOI
10.1177/0003702818823239
language
English
LU publication?
yes
id
35297f96-1dc9-42f2-86dd-0fac3ac2255a
date added to LUP
2019-02-27 10:18:51
date last changed
2019-06-27 12:31:01
@article{35297f96-1dc9-42f2-86dd-0fac3ac2255a,
  abstract     = {Quantitative measurements of CH<sub>4</sub> mole fractions at different HAB in the flame were realized by a calibration measurement in a low pressure gas flow of N<sub>2</sub> with a small admixture of known amount of CH<sub>4</sub>. A comprehensive study of the collision effects on the IRPS signal was performed in order to quantify the flame measurement. The concentration and temperature measurements were found to agree reasonably well with simulations using Chemkin. These measurements We demonstrate quantitative measurements of CH<sub>4</sub> mole fractions in a low pressure fuel-rich premixed dimethyl ether/oxygen/argon flat flame (Φ =1.87, 37 mbar) using mid-infrared polarization spectroscopy (IRPS). Non-intrusive in situ detection of CH<sub>4</sub>, C<sub>2</sub>H<sub>2</sub> and C<sub>2</sub>H<sub>6</sub> in the flame was realized by probing the fundamental asymmetric C-H stretching vibration bands in the respective molecules in the spectral range 2970-3340 cm<sup>-1</sup>. The flame was stabilized on a McKenna-type porous plug burner hosted in a low pressure chamber. The temperature at different heights above the burner (HAB) was measured from the line ratio of temperature sensitive H<sub>2</sub>O spectral lines recorded using IRPS. prove the potential of IRPS as a sensitive, non-intrusive, in situ technique in low pressure flames. },
  author       = {Sahlberg, Anna-Lena and Hot, Dina and Lyngbye Pedersen, Rasmus and Zhou, Jianfeng and Aldén, Marcus and Li, Zhongshan},
  issn         = {1943-3530},
  language     = {eng},
  month        = {03},
  number       = {6},
  pages        = {653--664},
  publisher    = {Society for Applied Spectroscopy},
  series       = {Applied Spectroscopy},
  title        = {Mid-Infrared Polarization Spectroscopy Measurements of Species Concentrations and Temperature in a Low-Pressure Flame},
  url          = {http://dx.doi.org/10.1177/0003702818823239},
  volume       = {73},
  year         = {2019},
}