Numerical Analysis of Exhaust Gas Recirculation and Water Injection Process in Diesel Engine

Abstract

Combustion Process in internal combustion engine consists of various steps. Numerical solution and simulation of the internal combustion engine provide a useful insight into the details of sub-processes of the combustion. Emissions such as CO, NO, and NO2 have a harmful impact on the environment as well as human health. The processes of Exhaust Gas Recirculation and Water Injection reduce the quantity of emissions produced in internal combustion engines. In this study, the combustion process in the diesel engine has been simulated. The engine used in the simulations was Peugeot Citroën Dw-10b. The result of the experimental data was compared with the simulation data, and it was found that the numerical solution obtained is very close to the experimental data. Value of Accumulated Chemical Heat Release (ACHR) obtained from numerical solution was also compared with the analytical value, and both values were very close to each other. Ansys Forte 2019 was used for the simulation of exhaust gas recirculation and water injection processes. The validation of the numerical solution was done for both EGR and WI processes. A parametric study was also performed to evaluate the effect of operating parameters on emissions. Parameters such as intake air temperature, fuel droplet temperature, the start of injection, and duration of injection were varied and the quantities of the nitrous oxide emissions, carbon monoxide emissions, and soot production were studied. The study is useful in understanding the effects of various input and operating parameters of the diesel engine on emissions.