20213 微小重力下における超希薄炭化水素-空気混合気の燃焼改善に関する研究 : 燃焼速度に及ぼす乱れの影響について(熱工学(3))

概要

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Recently, the internal combustion engines are required to reduce the pollutant emissions and obtain high efficiency. To solve those, lean bum engines and exhaust gas recirculation (EGR) are effective. However, control over lean burn or EGR, causes by a decrease in the engine-performance which directly effects the decrease on burning velocity and miss fire. This study has been carried out to examine the influence of turbulence on burning velocity and flame speed for extremely lean mixtures under microgravity and normal gravity conditions to improve the combustion. The experimental results are as follows: (1) Burning velocity and flame speed increase with increasing swirl intensity under both gravity conditions. (2) Lean flammability limit shifts to wide range with increasing swirl intensity for CH_4-N_2-O_2-CO_2 mixtures.
一般社団法人日本機械学会の論文
2006-03-09