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PAHs Measurement in a Laminar Diffusion Flame of Diesel Fuel
Published May 18, 2005 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
Since the engine combustion was affected with fuel spray, mixing process of fuel and air, combustion chamber geometry as well as fuel characteristics, it was very difficult to find out the clear effect of fuel property. To clear-up the change of emission characteristic caused by fuel change, we had proposed a fundamental flame research method using a small pool flame system. By using this pool flame system, PM formation mechanism in a diffusion flame of diesel fuel contaminated with lubricating oil was investigated as a fundamental study of diesel PM emission. To clear the PM formation mechanism in a flame, characteristics of PAHs (polycyclic aromatic hydrocarbons) formation in a flame were measured by a laser-induced fluorescence (LIF) method. It was compared with PM characteristics measured by a laser-induced incandescence (LII) method. The effect of the lubricating oil contamination on the PAHs distributions in the flame was discussed. As the result, it was found that the PAHs concentration in the flame increased with increasing the lubricating oil contamination and it caused the increase of PM formation in the flame.