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UV planar laser induced fluorescence imaging of hot carbon dioxide in a high-pressure flame

Authors:	Email author" target="_blank">T?Lee Email author WG?Bessler C?Schulz M?Patel JB?Jeffries RK?Hanson

Institution:	(1) High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA;(2) Interdisciplinary Center for Scientific Computing (IWR), Universität Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg, Germany;(3) Physikalisch-Chemisches Institut (PCI), Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany

Abstract:	UV planar laser-induced fluorescence (PLIF) images of hot carbon dioxide (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 molecular oxygen LIF signals. Spectrally resolved single point measurements are used for correction of the remaining oxygen 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. PACS 42.62.Fi; 42.30.Va; 07.25+k; 39.30+w

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