メタン/純酸素混合気の二酸化炭素希釈による乱流燃焼特性 : 熱工学,内燃機関,動力など

概要

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The purpose of this paper is to investigate the turbulent combustion properties of CH_4/O_2 mixtures diluted by CO_2 compared to those of CH_4/O_2/N_2 mixtures to study the feasibility of new combustion method, which is expected to be effective in the NO_x reduction and the improvement of combustion. Experiments are conducted by using spherical combustion bomb for applications to internal combustion engines. Consequently, it is shown that CH_4/O_2/CO_2 mixtures have larger turbulent burning velocity as compared to CH_4/O_2/N_2 mixtures under almost the same turbulent condition. Furthermore these mechanisms are discussed in view of change in local burning velocity due to flame stretch. As a result it is concluded that the differences in Markstein number between the CH_4/O_2/CO_2 mixtures and CH_4/O_2/N_2 mixtures, which are mainly due to the differences in Lewis number, cause the relative change in local burning velocity and this leads to the relative increase in the turbulent burning velocity in favor of CH_4/O_2/CO_2 mixtures.
社団法人日本機械学会の論文
2001-09-25