火花点火エンジンにおける自着火開始点の数値解析

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タイトル別名
  • Numerical Analysis of Auto-Ignition Sites in Spark Ignition Engines.
  • ヒバナ テンカ エンジン ニ オケル ジチャッカ カイシテン ノ スウチ カイセキ

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The location of knock initiation was analyzed using the random motion simulation in a combustion process in an s.i. engine. The spatially averaged tranport equations were solved in conjunction with a reduced kinetic model for the low temperature oxidation and with a combustion model for a turbulent flame propagation in a cell-averaged form. The prediction for a central spark case shows that the computed time of the first local auto-ignition agrees well with an experiment. The simulation for an off-center spark case shows that the first autoignition sites are in the locations comparatively close to the wall and not in the core region of the unburned mixture.

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