Abstract
This paper presents a comprehensive study of diesel combustion with high turbulence induced during the combustion process together with newly obtained results for two-stage combustion. In the two-stage combustion process the primary combustion is made fuel-rich to reduce NOx, and then the increased particulate is oxidized by strong turbulence generated during the secondary combustion. The first part of the paper shows the results and mechanism achieving significant reductions in particulate emissions by strong turbulence. The second part of the paper shows the results with two stage combustion, showing that both NOx and smoke were reduced significantly, while fuel consumption was maintained. Consideration of chemical reaction kinetics shows this combustion process to have further potential for reduction in particulate and NOx emissions.