Femtosecond, two-photon, laser-induced fluorescence (TP-LIF) measurement of CO in high-pressure flames

被引:21
作者
Rahman, K. Arafat [1 ]
Patel, Karna S. [1 ]
Slipchenko, Mikhail N. [1 ,4 ]
Meyer, Terrence R. [1 ]
Zhang, Zhili [2 ]
Wu, Yue [2 ]
Gord, James R. [3 ]
Roy, Sukesh [4 ]
机构
[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA
[2] Univ Tennessee, Dept Mech Aerosp & Biomed Engn, Knoxville, TN 37996 USA
[3] Air Force Res Lab, Wright Patterson AFB, OH 45433 USA
[4] Spectral Energies LLC, 4065 Execut Dr, Beavercreek, OH 45430 USA
关键词
CARBON-MONOXIDE; EXCITATION; OXYGEN; BURNER; FLOWS;
D O I
10.1364/AO.57.005666
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Quantitative, kiloherz-rate measurement of carbon monoxide mole fractions by femtosecond two-photon, laser-induced fluorescence (TP-LIF) was demonstrated in high-pressure, luminous flames over a range of fuel-air ratios. Femtosecond excitation at 230.1 nm was used to pump CO two-photon rovibrational X-1 Sigma(+)-> B-1 Sigma(+) transitions in the Hopfield-Birge system and avoid photolytic interferences with excitation irradiance similar to 1.7 x 10(10) W/cm(2). The effects of excitation wavelength, detection scheme, and potential sources of de-excitation were also assessed to optimize the signal-to-background and signal-to-noise ratios and achieve excellent agreement with theoretically predicted CO mole fractions at low and high pressure. (C) 2018 Optical Society of America
引用
收藏
页码:5666 / 5671
页数:6
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