The proposed research is motivated by increasing concern that Diesel participates are harmful to the environment and to human health. In particular, the increasing number of sub- micron soot particles emitted from modern diesel engines needs to be addressed. A prerequisite to the in-cylinder reduction of these particles and the effect of different operating conditions is a better understanding of the basic processes forming and oxidising these particles. The proposed research will aim at developing a comprehensive model capable of predicting the size distribution (PSDF) and morphology of carbon particles in flames and diesel engines. This will be realised by
(a) the development of physical models, particularly better estimations of the oxidation rates of particles formed in diesel engines as well as a model for particle aggregation, and fast numerical methods for solving the detailed chemical kinetics and dynamics, validated by experiments,
(b) application of the models to DI Diesel engines by means of combined CFD calculations and stochastic reactor models, and validation by comparison to size distribution measurements in Diesel engines. It is envisaged that a major exploitable outcome will be a comprehensive model for predicting soot size distribution and morphology in practical combustion systems, which might become a valuable tool for engineers. This could successively lead to a reduction of the number and mass of paniculate matter emitted from Diesel engines. While the direct beneficiary will be engine manufacturers, the ultimate beneficiary will be the community at large.
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