NO concentrations in laminar premixed CH4/O-2/N-2 flames with varying equivalence ratio

作者：Jin Seong Ho; Shim Beom Joo; Kim Seong Wook; Park Kyoung Suk^*; Kim Gyung Soo

来源：Journal of Mechanical Science and Technology, 2013, 27(7): 2209-2215.

DOI：10.1007/s12206-013-0602-0

• Nitric oxide (NO)
• Laser-induced fluorescence (LIF)
• Laminar premixed flame
• Equivalence ratio

Number density and concentration of nitric oxide have been investigated in laminar premixed CH4/O-2/N-2 flames using laser-induced fluorescence technique. Emphasis was placed on quantitative measurements, which were taken in flames at various equivalence ratios ranging from 0.9 similar to 3.0. The flow rate was fixed at 2 SLPM. The NO A-X (0,0) vibrational band around 226 nm was excited using a XeCl excimer-pumped dye laser. By selecting an appropriate NO transition, the interferences from elastic scattering and O-2 fluorescence were minimized. Results show that the maximum NO concentration increased at the range of equivalence ratio from I center dot = 0.9 to 1.6, decreased from I center dot = 1.6 to 2.0 and slowly increased with increasing equivalence ratio above I center dot = 2.0. Also, the maximum NO concentration was at around the reaction zone.

• 出版日期2013-7