Experimentally based correction procedures for planar laser-induced fluorescence measurements of mean species concentration

Experimentally-based correction procedures are demonstrated which enhance t he quantitative nature of planar laser-induced fluorescence (PLIF) images f or mean species concentration by correcting for the influence of the electr onic quenching rate coefficient. Implementation of these methods requires o nly the ability to make PLIF and laser-saturated fluorescence (LSF) measure ments. Though applied herein to NO, these procedures are broadly applicable both in terms of species and users. Moreover, they are generally effective regardless of the error gradients associated with spatial variations in th e electronic quenching rate coefficient. In such general environments, thes e methods produce quenching-corrected, spatially resolved PLIF images of me an species concentration with a total uncertainty equivalent to that of a s ingle LSF measurement.