Abstract
Planar laser-induced fluorescence is currently widely applied to research on combustion. However, conventional approaches for semi-quantitative measurement could not provide the satisfactory solution and the problem due to collisional quenching remains to be solved. This paper describes the two-dimensional (2D) quenching-time-constant measurement of OH:A 2 Σ +(υ′ = 1) and NO:A 2 Σ(υ′ = 0) in flame cross sections at atmospheric pressure. These measurements involve 1–2 ns decay time of the excited state using a high-speed image intensifier and a tunable laser with a pulse duration of 3 ns at FWHM. The correlation factors of the exponential fits for the fluorescence decays after the laser pulse were larger than 0.999 in all experiments presented in this study. Furthermore, the measured Stern-Volmer plots of the quenching rate at 1.0, 1/2, 1/3, and 1/4 atm pressure using the same experimental apparatus was confirmed to have a linear relationship for both OH and NO, showing that the 2D decay-time measurements of 1–2 ns have been successful. For NO:A 2 Σ(υ′ = 0), the obtained quenching rates inside the inner cone and in the outer flame in the NO-seeded methane-air Bunsen flame were 8.7 × 108 and 7.8 × 108 s−1, respectively, and for OH:A 2 Σ(υ′ = 1), the obtained quenching rate mapping in the outer flame was around 5.6 × 108 s−1 in the methane-air flame.
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References
A. Arnold, W. Ketterle, H. Becker, J. Wolfrum: Appl. Phys. B51, 99 (1990)
P. Andrensen, G, Meijer, H. Schluter, H. Voges, A. Koch, W. Hentschel, W. Opperman, E. Rothe: Appl. Opt.29, 2392 (1990)
M. Tsujishita, A. Hirano: Jpn. J. Appl. Phys.32, 5564 (1993)
R.P. Lucht, D.W. Sweeney, N.M. Laurendeau: Combust. Flame50, 189 (1983)
J.E.M. Goldsmith: Appl. Opt.26, 3556 (1987)
M. Schafer, W. Ketterle, J. Wolfrum: Appl. Phys. B52, 341 (1991)
T.Q. Ni, L.A. Melton: Appl. Spectrosc.45, 938 (1991)
A. Hirano, F. Ricoul, M. Tsujishita: Jpn. J. Appl. Phys.32, 3300 (1993)
U.E. Meijer, G.A. Raiche, D.R. Crosley, G.P. Smith, D.J. Eckstrom: Appl. Phys. B53, 138 (1991)
G.A. Raiche, D.R. Crosley: J. Chem. Phys.92, 5211 (1991)
P.H. Paul, J.A. Gray, J.L. Durant Jr., J.W. Thiman Jr.: Appl. Phys. B57, 249 (1993)
M. Kollner, P. Monkhouse, J. Wolfrum: Chem. Phys. Lett.168, 355 (1990)
R. Schwartzwald, P. Monkhouse, J. Wolfrum: Chem. Phys. Lett.158, 60 (1989)
I.S. McDermid, J.B. Laudenslager: J. Quant. Spectrosc. Radiat. Transfer27, 483 (1982)
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Tsujishita, M., Hirano, A. Two-dimensional quenching lifetime measurement of OH:A 2 Σ +(υ′ = 1) and NO:A 2 Σ(υ′ = 0) in atmospheric-pressure flames. Appl. Phys. B 62, 255–262 (1996). https://doi.org/10.1007/BF01080953
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DOI: https://doi.org/10.1007/BF01080953