Abstract

The influence of femtosecond laser-induced plasma (FLIP) on the stability of a premixed ${\mathrm{CH}}_4/{\mathrm{O}}_2/{\mathrm{N}}_2$ flame is investigated at atmospheric pressure. The laser energy, laser repetition rate, the equivalence ratios, and the volume percentage of oxygen in ${\mathrm{O}}_2/{\mathrm{N}}_2$ blends are varied. Our findings indicate that the flame blow-off velocity is a function of these parameters. It has been experimentally found that the flame blow-off velocity increases by a factor of two with FLIP than without FLIP. A high-repetition-rate and a great energy laser-induced plasma flameholding, as a non-intrusive optical flameholding, may be a feasible alternative for any combustor.

©2012 Optical Society of America

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