3212 蛍光寿命の補正を行ったLIF計測による筒内時間分解HCHO濃度評価(S44-1 エンジンの新しい計測技術とモデリング(1),S44 エンジンの新しい計測技術とモデリング)

概要

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Laser induced fluorescence measurement of formaldehyde has been conducted in an engine cylinder operated on premixed compression ignition of dimethyl ether. It is crucial to quantitatively trace the intermediate, which controls the low temperature oxidation as a chain reaction suppressor. For this purpose, the fluorescence signal intensity depending on pressure, temperature and composition was corrected using fluorescence decay rate information. In particular, "Two-Step Decay Model", which successfully reproduces the non-linear pressure dependence of the decay rate, was applied with separately determined parameters using an optical cell. It was demonstrated that the model reasonably estimated the HCHO fluorescence lifetime through the range of pressure above and below the limit of direct lifetime measurement.
社団法人日本機械学会の論文
2005-09-18