WS4 乱流予混合火炎の火炎形態について

概要

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Direct numerical simulations of high intensity H_2-air turbulent premixed flames propagating in two-dimensional homogeneous isotropic turbulence are conducted to clarify the effects of turbulent intensity and tubulence length scale on the local flame structure. Detailed kinetic mechanism with 12 reactive species and 27 elementary reactions is used to represent the H_2-O_2-N_2 reaction in turbulence. DNS are conducted for two series. In the first series, turbulence intensity are changed from 10 to 30 times of the laminar burning velocity under the constant turbulence length scale (l/δ_L=4.84). In the second series, turbulence length scale are changed from 1.00 to 7.26 times of the laminar flame thickness under the constant turbulence intensity (u'_<rms>/S_L=20.0). From the results of DNS, flame structures in distributed reaction zone and well stirred reaction zone are clarified.
日本流体力学会の論文
2001-07-31