4728 水の蛍光減衰効果を含む蛍光寿命補正を施したLIF法によるHCCI機関内成分濃度評価(S55-1 エンジン現象解析-基礎計測と数値計算-(1),S55 エンジン現象解析-基礎計測と数値計算-)

概要

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Laser induced fluorescence measurement of formaldehyde has been conducted in a homogeneous charge compression ignition engine cylinder operated with 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 "Two-Step Decay Model", which successfully predicts the non-linear pressure dependence of the fluorescence decay rate. In this study, the model parameters depending on H_2O partial pressure were separately determined using an optical cell. The crank angle resolved profile of HCHO concentration obtained by this correction corresponds with the result of detailed chemical kinetic mechanism calculation.
社団法人日本機械学会の論文
2006-09-15