Abstract

Proof-of-principle experiments have been performed with O₂ laser-induced fluorescence (LIF) and O₂ Raman scattering to determine temperature for turbomachinery applications. A broadband ArF excimer laser was used in the experiments, and both sidescatter and backscatter configurations were investigated. The O₂ LIF signal was collected broadband by means of glass filters and was ratioed to the O₂ Raman signal to produce a quantity that was dependent only on temperature in the sidescatter configuration. Experiments in the backscatter configuration showed that spectrally resolved O₂ LIF data must be collected to avoid interference from window fluorescence. The experimental results agreed with published computational results on the dependence of the O₂LIF emission with temperature. Potential problems and solutions associated with the application of this technique to turbomachinery measurements are discussed.

© 1990 Optical Society of America