Abstract
10 kHz two-color OH planar laser-induced fluorescence (PLIF) thermometry was demonstrated in both laminar Hencken flames and turbulent premixed jet flames using two injection-seeded optical parametric oscillators (OPOs) pumped by a high-speed three-legged burst-mode laser. The two burst-mode OPOs generate ${\sim}{{5}}\;{\rm{mJ/pulse}}$ at 282 nm and 286 nm to excite the ${{\rm{Q}}_1}\!({{5}})$ and ${{\rm{Q}}_1}\!({{14}})$ transitions of the ${{\rm{A}}^2}{\Sigma ^ +}\leftarrow{{\rm{X}}^2}\Pi$ (1,0) system of OH, respectively. PLIF images were collected simultaneously from each of the two transitions and ratios of intensities from the two images were used to determine local temperatures. Analyses of flame curvature, temperature, and the correlation in time of these two quantities are also discussed. The results from this work are promising for the use of this technique in more complex flow environments and at, potentially, even higher repetition rate.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Joseph D. Miller, Johannes W. Tröger, Sascha R. Engel, Thomas Seeger, Alfred Leipertz, and Terrence R. Meyer
Appl. Opt. 60(1) 98-108 (2021)
J. M. Seitzman, R. K. Hanson, P. A. DeBarber, and C. F. Hess
Appl. Opt. 33(18) 4000-4012 (1994)
Naibo Jiang, Paul S. Hsu, Stephen W. Grib, and Sukesh Roy
Opt. Express 27(12) 17017-17026 (2019)