Abstract
The present study involves the numerical simulation of the diesel engine by means of Diesel-RK, tool for determining engine characteristics for diesel, vegetable oil, animal fats, waste oils and alcohols respectively. Simulation results are verified with experimental results and exhibits a good agreement for diesel fuel. The tool also delivers a reasonably accurate prediction of in-cylinder pressure, in-cylinder heat rate, and fuel consumption in combustion and NOX emission level. The study shows maximum power and cylinder peak pressure obtained were of 17.65% for coconut oil and 1.5%, 0.77%, 2.3%, and 17.8% for rapeseed oil, fish oil and veal oil, waste frying oil and propanol biodiesel respectively. On the other hand, the ignition delay was found to be lower than diesel for biodiesel and even decreased with an increase in engine load. The combustion duration obtained to be higher for biodiesels compared to diesel fuel. Simulation results are conducted under different engine loads, constant speed (1500 rpm) and advanced injection timing 23.0° b TDC with higher injection pressure.
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