ディーゼル噴霧火炎内のすす生成に関する化学反応論的解析(熱工学,内燃機関,動力など)

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This work investigates the soot formation process in a diesel jet flame using a detailed kinetic soot model implemented into the KIVA-3 V multidimensional CFD code. The numerical model is based on the KIVA code which is modified to use CHEMKIN as the chemistry solver. The detailed soot model used is based on the method of moments, which begins with fuel pyrolysis, followed by the formation of polycyclic aromatic hydrocarbons, their growth and coagulation into spherical particles, and finally, surface growth and oxidation of the particles. The model can describe the spatial and temporal characteristics of soot formation processes such as soot precursors distributions, nucleation rate and surface reaction rate. The calculation results show that the soot particles are formed to surround the soot precursor formation region and to extend downstream. It is also found that the dominant soot growth process differs by the region in the fuel jet. The particle inception is fast around the central region of the jet, and C_2H_2 surface reaction rate becomes higher toward the periphery of the jet.
2005-01-25