0720 混合気の温度不均一性がHCCI燃焼に及ぼす影響の数値解析(S43-1 エンジンにおける計測およびモデリング(1),S43 エンジンにおける計測およびモデリング)

概要

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We analyzed the interrelationship between mixture heterogeneity and reaction in a homogeneous charge compression ignition (HCCI) combustion, using the Large Eddy Simulation (LES) in conjunction with a reaction kinetics model. The aim of this analysis is to find the statistical characteristics of the mixture heterogeneity in turbulent flow field for moderating the HCCI combustion and for increasing an output limit, which is restricted by an intense knock. Several different initial conditions of thermal heterogeneity were given at the intake valve closing time. The auto-ignition and combustion behaviors were analyzed for several different sets of the rms of the fluctuations in temperature. The analyses show that the heterogeneous thermal distribution at the intake valve closing time has little effect on the HCCI combustion.
一般社団法人日本機械学会の論文
2007-09-07