Spectral interferences from formaldehyde in CH PLIF flame front imaging with broadband B-X excitation
Författare
Summary, in English
In this letter we show that the use of slightly broadband laser sources like multimode alexandrite lasers for CH PLIF bears the danger of interferences from formaldehyde. Such interferences occur when the laser frequency is not carefully tuned to the B-X (0,0) R-branch band head at around 387.2 nm and manifest either in the appearance of an additional layer in the PLIF image or in a slight broadening of the actual CH layer. With careful frequency selection the formaldehyde signals were not observed. Suppression of the interferences is feasible by employing appropriate spectral filters. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
Avdelning/ar
Publiceringsår
2011
Språk
Engelska
Sidor
583-585
Publikation/Tidskrift/Serie
Combustion and Flame
Volym
158
Issue
3
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Atom and Molecular Physics and Optics
Nyckelord
- CH radical
- PLIF imaging
- Flame front
- Formaldehyde
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0010-2180