Experimental Study of Ignition Mechanism of Japanese Commercial Gasoline Using a Rapid Compression Machine

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  • 急速圧縮装置を用いた日本の実用ガソリンの自着火機構に関する研究
  • キュウソク アッシュク ソウチ オ モチイタ ニホン ノ ジツヨウ ガソリン ノ ジチャッカ キコウ ニ カンスル ケンキュウ

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Ignition delay times of Japanese commercial gasoline, TRF (Toluene reference fuel; Toluene, n-heptane and iso-octane blended fuel) were measured at equivalence ratios of 0.5 and 1.0, at pressures of 2.0 and 3.0 MPa in temperature ranges of 657 - 861 K in a rapid compression machine. The simulated gasoline surrogate ignition delay times using a detailed chemical kinetic model were compared with measured ignition delay times, and the chemical kinetic mechanism for gasoline ignition were investigated. The ignition delay times of Japanese commercial gasoline increased with decreasing the equivalence ratio and decreased with increasing pressure. The ignition delay times of TRF were approximately the same as those of the commercial gasoline over the measured temperature and pressure range. While the simulated ignition delay times were slightly longer than those of the experiments, the tendency of the experimental ignition delay times was well predicted by the simulations. OH flux analysis and sensitivity analysis for ignition using the detailed chemical kinetic model of gasoline surrogate indicate that the low temperature oxidation of the n-paraffins and iso-paraffins included in gasoline are important for the Japanese commercial gasoline ignition.

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