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Applied Physics B

, Volume 118, Issue 3, pp 361–368 | Cite as

Quantum cascade laser-based MIR spectrometer for the determination of CO and \(\hbox {CO}_2\) concentrations and temperature in flames

  • Patrick Nau
  • Julia Koppmann
  • Alexander Lackner
  • Katharina Kohse-Höinghaus
  • Andreas Brockhinke
Article

Abstract

An experimental setup for the simultaneous detection of CO and \(\hbox {CO}_2\) and the temperature in low-pressure flames using a pulsed quantum cascade laser at 4.48 μm is presented. This comparatively new type of laser offers good output energies and beam quality in the mid-infrared, where the strong fundamental transitions of many molecules of interest can be accessed. A single-pass absorption setup was sufficient to obtain good accuracy for the stable species investigated here. Due to the high repetition rate of the laser and the speed of the data acquisition, measurement of two-dimensional absorption spectra and subsequent tomographic reconstruction was feasible. As demonstration of this technique, two-dimensional CO and \(\hbox {CO}_2\) concentrations have been measured in two fuel-rich methane flames with different coflow gases (nitrogen and air). The influence of the coflow gas on the flame center concentration profiles was investigated and compared with one-dimensional model simulations.

Keywords

Burner Surface Quantum Cascade Laser Tomographic Reconstruction Flame Center Interband Cascade Laser 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This research was funded in part by DFG in SFB 686 (TP B3 and TP C5). Help of Raimund Noske with the absorption cell measurements is greatly appreciated.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Patrick Nau
    • 1
    • 2
  • Julia Koppmann
    • 2
  • Alexander Lackner
    • 2
  • Katharina Kohse-Höinghaus
    • 2
  • Andreas Brockhinke
    • 2
  1. 1.Institute of Combustion TechnologyGerman Aerospace CenterStuttgartGermany
  2. 2.Universität BielefeldBielefeldGermany

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