Study on Crucial Factor of Knock Intensity Using Constant Volume Vessel

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  • 定容容器を用いた燃焼実験によるノック強度に影響を及ぼす因子についての考察
  • テイヨウヨウキ オ モチイタ ネンショウ ジッケン ニ ヨル ノック キョウド ニ エイキョウ オ オヨボス インシ ニ ツイテ ノ コウサツ

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The clarification of knock phenomena is necessary for further improvement of the thermal efficiency of gasoline engines. In order to clarify the factor that influences knock intensity, the propagating flame and behavior of end gas on knock occurrence process were observed using a constant volume vessel in this study. In the experiments, strong pressure oscillation occurred after auto-ignition in thermal boundary layer by end-wall. Then, one-dimensional numerical simulations were carried out under several thermal boundary conditions in order to investigate the influences of thermal boundary layer on knock intensity. It was suggested that knock intensity was affected by thermal boundary layer.

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