Bessler, W.G.; Lee, T.; Schulz, Christof; Jeffries, J.B.; Hanson, R.K.:
UV laser-induced fluorescence of carbon dioxide in high-pressure flames
In: 3rd Joint meeting of the US sections of the combustion institute - Chicago, 2003, D35, 1-6
Buchaufsatz/Kapitel in Sammelwerk / Fach: Maschinenbau
Titel:
UV laser-induced fluorescence of carbon dioxide in high-pressure flames
Autor(in):
Bessler, W.G.; Lee, T.; Schulz, Christof im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Jeffries, J.B.; Hanson, R.K.
Erscheinungsjahr
2003
Erschienen in:
3rd Joint meeting of the US sections of the combustion institute - Chicago, 2003, D35, 1-6

Abstract:

Laser-induced fluorescence (LIF) of carbon dioxide (CO2) is investigated with excitation wavelengths between 215 and 255 nm. We present spectrally resolved measurements in premixed CH4/O2/Ar and CH4/air flat-flames at pressures between 5 and 40 bar and fuel/air ratios between 0.8 and 1.9. The LIF signal consists of a broad (200-450 nm) continuum with a faint superimposed band structure, and this signal is absent in similar H2/O2/Ar flames. There is strong evidence this signal arises from CO2, as the variation of signal intensity with excitation wavelength, equivalence ratio and adiabatic flame temperature correlates with CO2 absorption cross-sections recently measured in shock-tube experiments. Linear dependence of LIF signal intensity versus pressure and excitation energy is observed in the investigated ranges. Work to quantify the LIF quantum yield is underway.