Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Mechanical Power Engineering

Combustion engines design mainly depends on achieving high combustion efficiency, taking into account pollutants concentrations resulting from combustion process. Researchers always try new ways to design efficient combustion chambers by studying the effects of changing different variables like burner position, direction, design, the quality of fuel used, and its impact on the performance of combustion systems. Many researches dealt with studying these flames either practically or theoretically and came to understanding the prevalence of these flames. The thesis contains a numerical study to simulate the combustion process in non-premixed flame of natural gas burner of 300 kW gas turbine, using computational fluid dynamics program (Ansys Fluent 14).The combustion chamber of the gas turbine is a cylinder of diameter 1.07 m, and a length of 1.6 m ending with conical shape until you reach cylinder diameter of 0.3 m, with a length of 0.7 m, where the exit of combustion products. The model was divided into a mesh of about 1.7 million cells. The numerical simulations were performed by solving the governing equations in a three-dimensional model using realizable K- {u0190} equations to express the turbulence

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