Abstract
The three dimensional numerical simulation on NOX and soot emissions was carried out on 186 FA diesel engine fueled with pure diesel and B20 fuel using CFD software Fire v2008 and the generating rule and distribution of NOX and soot of two fuel was described. Through comparison of the measured indicator diagrams, it verified the accuracy of the model. Based on the simulation of the original diesel engine fueling with B20 fuel, the swirl ratio and injection advance angle are optimized and it proposes technical programs to reduce two kinds of emissions simultaneously, which is optimized of NOX and soot emissions, when the swirl ratio is 2.7 and injection advance angle is 352.5°.
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