Abstract

Laser-induced-fluorescence techniques have been used successfully for quantitative two-dimensional measurements of nitric oxide. NO A–X(0, 2) excitation at 248 nm recently found applications in internal-combustion engines. We assess the collisional processes that influence quantification of signal intensities in terms of saturation, rotational energy transfer, and line broadening, using laminar high-pressure methane/air and n-heptane/air flames at pressures as high as 80 bars (8 × 10⁶ Pa). A calibration method that is applicable in technical combustion systems based on addition of NO to the burning flame is investigated for various air/fuel ratios and pressures and yields information about the influence of NO reburn processes.

© 1999 Optical Society of America

Laser-induced-fluorescence detection of nitric oxide in high-pressure flames with A–X(0, 2) excitation

Christof Schulz, Volker Sick, Johannes Heinze, and Winfried Stricker
Appl. Opt. 36(15) 3227-3232 (1997)

Strategies for laser-induced fluorescence detection of nitric oxide in high-pressure flames. II. A–X(0,1) excitation

Wolfgang G. Bessler, Christof Schulz, Tonghun Lee, Jay B. Jeffries, and Ronald K. Hanson
Appl. Opt. 42(12) 2031-2042 (2003)

Strategies for laser-induced fluorescence detection of nitric oxide in high-pressure flames. III. Comparison of A–X excitation schemes

Wolfgang G. Bessler, Christof Schulz, Tonghun Lee, Jay B. Jeffries, and Ronald K. Hanson
Appl. Opt. 42(24) 4922-4936 (2003)

Planar laser-induced-fluorescence imaging measurements of OH and hydrocarbon fuel fragments in high-pressure spray-flame combustion

M. G. Allen, K. R. McManus, D. M. Sonnenfroh, and P. H. Paul
Appl. Opt. 34(27) 6287-6300 (1995)

Comparisons of laser-saturated, laser-induced, and planar laser-induced fluorescence measurements of nitric oxide in a lean direct-injection spray flame

Clayton S. Cooper, Rayavarapu V. Ravikrishna, and Normand M. Laurendeau
Appl. Opt. 37(21) 4823-4833 (1998)