title: Laser-induced fluorescence of formaldehyde in combustion using third harmonic Nd:YAG laser excitation.
abstract: 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.
authors: Division of Combustion Physics, Lund Institute of Technology, P.O. Box 118, SE-221 00 Lund, Sweden. christian.brackmann@forbrf.lth.se
authors: Christian
authors: C
authors: Brackmann
authors: Jenny
authors: J
authors: Nygren
authors: Xiao
authors: X
authors: Bai
authors: Zhongshan
authors: Z
authors: Li
authors: Henrik
authors: H
authors: Bladh
authors: Boman
authors: B
authors: Axelsson
authors: Ingemar
authors: I
authors: Denbratt
authors: Lucien
authors: L
authors: Koopmans
authors: Per-Erik
authors: PE
authors: Bengtsson
authors: Marcus
authors: M
authors: Aldén
mesh_terms: D005453:Fluorescence; D005557:Formaldehyde / Q000737:chemistry*; D007834:Lasers; D008738:Methyl Ethers / Q000737:chemistry; D013053:Spectrophotometry
chemical_list: D008738:Methyl Ethers; D005557:Formaldehyde; C033413:dimethyl ether