National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China.
Opt Lett. 2011 May 15;36(10):1930-2. doi: 10.1364/OL.36.001930.
We first research the effects of femtosecond-laser-induced plasma (FLIP) on a laminar premixed methane/oxygen/nitrogen flame speed with a wide range of equivalence ratios (0.8-2.0) at atmospheric pressure. It is experimentally found that the flame speed increases by 30.8% at equivalence ratio 1.33, and the effects of the FLIP on the flame speed are more remarkable when the methane is rich. The self-emission spectra from the flame and the plasma are studied, and the presence of the oxygen atom is likely to be a key factor in enhancing flame speed.
我们首先研究了飞秒激光诱导等离子体（FLIP）对大气压下大范围当量比（0.8-2.0）层流预混甲烷/氧气/氮气火焰速度的影响。实验发现，当量比为 1.33 时，火焰速度增加了 30.8%，并且当甲烷较富时，FLIP 对火焰速度的影响更为显著。研究了火焰和等离子体的自发射光谱，氧原子的存在可能是提高火焰速度的关键因素。
