火花点火エンジンにおける火炎成長過程のフラクタル次元推移(熱工学,内燃機関,動力など)

概要

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Turbulent propagating flame fronts during flame growth period were visualized by a laser-light sheet technique in an optically accessible single-combustion spark ignition engine. The time-resolved continuous images of the developing flame fronts were analyzed to obtain the fractal dimension of the wrinkling flame. The results show that the fractal dimension increases with time as the flame grows and that the fractal dimension develops faster in a stronger turbulence field. The growing nature of the fractal dimension is shown by the empirical equation that was reduced from the examinations of the temporal rate of an increase in the fractal dimension. The coefficients of the empirical equation were correlated with turbulence intensity measured by a cross-correlation PIV technique. The model proposed in this study was compared with existing combustion models.
一般社団法人日本機械学会の論文
2003-01-25