UV planar laser induced fluorescence imaging of hot carbon dioxide in a high-pressure flame
In: Appl. Phys. B: Lasers Opt., Jg. 79 (2004) ; Nr. 4, S. 427-430
Zeitschriftenaufsatz / Fach: Maschinenbau
UV planar laser-induced fluorescence (PLIF) images of hot CO2 (CO2) are obtained in a laminar flame (CH4/air) at high pressure (20 bar) with excitation wavelengths at 239.34 nm and 242.14 nm. Excitation wavelengths are chosen to minimize the contribution of nitric oxide and mol. O LIF signals. Spectrally resolved single point measurements are used for correction of the remaining O LIF interference. The continuum LIF signal from electronically excited CO2 is detected in a broad (280-400 nm) emission region. The UV PLIF of hot CO2 has the potential for application to a wide variety of diagnostic needs in high-pressure flames, combustors, and engines.