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Laser-induced fluorescence of formaldehyde in combustion using third harmonic Nd : YAG laser excitation

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Author

Summary, in English

Formaldehyde (CH2O) is an important intermediate species in combustion processes and it can through laser-induced fluorescence measurements be used for instantaneous flame front detection. The present study has focussed on the use of the third harmonic of a Nd:YAG laser at 355 nm as excitation wavelength for formaldehyde, and different dimethyl ether (C2H6O) flames were used as sources of formaldehyde in the experiments. The investigations included studies of the overlap between the laser profile and the absorption lines of formaldehyde, saturation effects and the potential occurrence of laser-induced photochemistry. The technique was applied for detection of formaldehyde in an internal combustion engine operated both as a spark ignition engine and as a homogenous charge compression ignition engine. (C) 2003 Elsevier B.V. All rights reserved.

Department/s

Publishing year

2003

Language

English

Pages

3347-3356

Publication/Series

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Volume

59

Issue

14

Document type

Journal article

Publisher

Elsevier

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • formaldehyde
  • spectroscopy
  • combustion diagnostics
  • laser-induced fluorescence

Status

Published

ISBN/ISSN/Other

  • ISSN: 1386-1425