TY - GEN
T1 - Femtosecond Laser Absorption Spectroscopy for Simultaneous Temperature and NH Concentration Measurements in An Ammonia/Hydrogen Flame
AU - Sun, Zijian
AU - Chang, Ziqiao
AU - Ji, Liang
AU - Mei, Bowen
AU - Wang, Weixiao
AU - Ju, Yiguang
N1 - Publisher Copyright:
© 2026, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2026
Y1 - 2026
N2 - A femtosecond ultraviolet laser absorption diagnostic for simultaneous temperature and NH concentration measurements is developed and demonstrated in an atmospheric ammonia/ hydrogen flame produced by a Hencken burner. The diagnostic system provides highaccuracy, calibration-free, single-shot measurement of NH based on the (0, 0) band of the A2II- X3E- electronic transition near 336 nm with an acquisition rate of 156 Hz. Theoretical NH absorbance is simulated using a line-by-line model. NH and temperature profiles along the flame central axis are measured. An estimated NH detection limit of 1.3 ppm was achieved. This diagnostic enables quantitative and time-resolved NH and temperature measurement, providing a new method for probing ammonia reaction kinetics in combustion and chemical synthesis.
AB - A femtosecond ultraviolet laser absorption diagnostic for simultaneous temperature and NH concentration measurements is developed and demonstrated in an atmospheric ammonia/ hydrogen flame produced by a Hencken burner. The diagnostic system provides highaccuracy, calibration-free, single-shot measurement of NH based on the (0, 0) band of the A2II- X3E- electronic transition near 336 nm with an acquisition rate of 156 Hz. Theoretical NH absorbance is simulated using a line-by-line model. NH and temperature profiles along the flame central axis are measured. An estimated NH detection limit of 1.3 ppm was achieved. This diagnostic enables quantitative and time-resolved NH and temperature measurement, providing a new method for probing ammonia reaction kinetics in combustion and chemical synthesis.
UR - https://www.scopus.com/pages/publications/105031171899
UR - https://www.scopus.com/pages/publications/105031171899#tab=citedBy
U2 - 10.2514/6.2026-0675
DO - 10.2514/6.2026-0675
M3 - Conference contribution
AN - SCOPUS:105031171899
SN - 9781624107658
T3 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2026
BT - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2026
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2026
Y2 - 12 January 2026 through 16 January 2026
ER -