超過濃予混合ふく射制御燃焼の反応機構

概要

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The structure of a luminous, laminar, methane-air premixed flame has been investigated using gas chromatograph-mass spectrometer (GC-MS) ; a luminous flame is realized owing to energy recirculation by radiation transferred from the luminous flame to a porous medium at the upstream side of the combustion space. The results show that in the early stage of reaction the methane breaks down to C_2H_2 through a pathway similar to that of the conventional methane-oxygen premixed flame, i.e., CH_4→CH_3→C_2H_6→C_2H_4→C_2H_2 Many species, such as C_2H_2, C_4H_2 and C_6H_6, appear in the upstream region of the luminous zone ; these species play an important role in soot nucleation. Furthermore, when the concentration of these species exceeds a critical point, that is, for an equivalence ratio larger than 1.8, a luminous flame is observed.
社団法人日本機械学会の論文
1996-06-25