Development and Use of a Spray Combustion Modeling to Predict Diesel Engine Efficiency and Pollutant Emissions : Part 2 Computational Procedure and Parametric Study

Abstract

An algorithm for predicting heat release rate and pollutant emission in direct injection diesel engine has been developed according to the mathematical model mentioned in the first report. Predictions made with the simulation have been compared with the data on a single-cylinder engine over a range of engine speeds, injection timings and swirl ratios. Predicted pressure diagram, and NO and soot emissions showed acceptable quantitative agreement with the data. A parametric study of the effect of variations in load, speed, injection rate, injection timing, swirl ratio and droplet size is then carried out.