Multidimensional engine modeling: NO and soot emissions in a diesel engine with Exhaust Gas Recirculation |
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Authors: | Hongsuk Kim Nakwon Sung |
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Affiliation: | (1) Fukui University of Technology, 3-6-1 Gakuen, Fukui-shi, Fukui, Japan;(2) Tokai University 1117 Kitakaname Hiratsuka-shi, Kanagawa, Japan; |
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Abstract: | The effects of EGR (Exhaust Gas Recirculation) on heavy-duty diesel engine performance, NO and soot emissions were numerically
investigated using the modified KIVA-3V code. For the fuel spray, the atomization model based on the linear stability analysis
and spray wall impingement model were developed for the KIVA-3V code. The Zeldovich mechanism for the formation of nitric
oxide and the soot model suggested by Hiroyasu et al. were used to predict the diesel emissions. In this paper, the computational
results of fuel spray, cylinder pressure, and emissions were compared with experimental data, and the optimum EGR rates were
sought from the NO and soot emissions trade-off. The results showed that the EGR is effective in suppressing NO but the soot
emission was increased considerably by EGR. Using cooled EGR, soot emission could be enhanced without worsening of NO. |
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