The NOx emission under acoustic excitation and no-excitation were compared on methane laminar partially premixed flame. The mechanism of NOx was analyzed by micro-T hermocouple, water-cooled sampling probe. The experimental results show that compared with no-excitation combustion, pulsating combustion produced less NOx emissions. There are two reasons including: 1peak temperature was reduced and the distribution of temperature was more uniform, 2the oxygen of flame was increased for rapid mixing rate and the reaction rate was enhanced.
Deng, K., Shen, Z., Wang, M., Hu, Y., & Zhong, Y. J. (2014). Acoustic excitation effect on NO reduction in a laminar methane-air flame. In Energy Procedia (Vol. 61, pp. 2890–2893). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2014.12.330