Quantitative Laser-Induced Fluorescence in Combustion

• Unité de recherche: OFEN
• Numéro de projet: 43122

Mots-clé (Allemand)

TP0075;F-Verbrennung

Description succincte (Allemand)

Quantitative Laser-Induced Fluorescence in Combustion

Publications / Résultats (Anglais)

The investigation of laminar counter flow flames was continued in the reporting period. An experimental setup for onedimensional spontaneous Raman scattering measurements was implemented. With this technique, the locally resolved temperature and major species concentrations can be simultaneously determined for a 1-D (line) measurement volume. From a set of measurements at different flame locations, 2-D fields of temperature and concentrations are derived. Experimental results for hydrogen flames are compared with predictions from direct numerical simulations (DNS) performed at the ETHZ. General agreement is found to be good. Some details in the choice of boundary conditions for the simulations will be modified for future work. The spatially resolved, two-dimensional information on temperature and species concentrations is also used in the data analysis of 2-D OH laser-induced fluorescence (LIF) measurements. There, the spatial distribution of LIF signal is affected by collisional quenching. Determination of correction factors requires the local temperature and collider concentrations which are now known from the Raman measurements. An attempt to record transient flame structures, while the flame shape changes from diffusion to edge flame, met with unexpected difficulties, and a different experimental approach is under development.

Auftragnehmer/Contractant/Contraente/Contractor:
Paul Scherrer Institut

Autorschaft/Auteurs/Autori/Authors:
Hubschmid,W.
Ciani, A.
Kreutner,W.

Documents annexés

• Quantitative laserinduzierte Fluoreszenz in der Verbrennung - Jahresbericht 2005 [PDF] 489 kB