Exergy analysis based on computational fluid dynamics of a two-stroke marine diesel engine

In the presented thesis; a numerical model based on computational fluid dynamics is established for a two-stroke marine diesel engine. In the first stage, combustion characteristics of the two-stroke marine diesel engine with the developed numerical model. In the second and main stage; an exergy analysis was carried out for the two-stroke marine diesel engine using the data obtained from the numerical model in detail. Geometrical model based on computational fluid dynamics was established with Ansys Spaceclaim Design Modeler. The dimensions of the two-stroke marine diesel engine are considered to be full scale in the modeling process. Computational fluid dynamicsbased analysis of the established geometric model was carried out using Ansys Forte software. The semi-detailed reduced chemical kinetic mechanism contained 36 species and 74 reactions of n-tetradecane was used to model the combustion process in the numerical study. Parametric studies were conducted for six different situations as a total, which are three of amount of total injected fuel and three of timing of fuel injection after the accuracy of the numerical model was shown. When the findings obtained are examined, the highest values of the first and second law efficiencies were determined to be approximately 51.1% and 43.15%, respectively.