Investigaktion of scalar mixing in the thin reaction zones regime using a simulationeous ch-lif/jrayleigh laeser techniuqe

摘要

Simultaneous tow-dimensional CH-LIF/rayleigh measurements were carried out in highly stretched turbulent premixed stoichiometric methane-air flames.These flames fall into the thin reaction zones regime.In this regine,the Kolmogorov scale is smaller than the preheat azone thickness of a laminar flame,but it is larger than the reaction zone thickness.therefore,small eddies can penetrate into the preheat zone but not into hte reaction zone.These samlle edies widen the preheat zone by turbulent mixing.