Simulation of CI Engine Using 60-Degree Sector Meshed Geometry with Diesel-Methanol/Ethanol Blended Fuel

The over-dependence on fossil fuel in IC engines has brought it to the verge of extinction. It also releases harmful pollutants into the atmosphere after combustion. This study aimed to simulate and analyse the functioning metrics of a diesel engine under different fuel blends to determine their impact on engine performance. The simulations used a 60-degree sector meshed geometry model with closed-cycle simulation. The simulations used different fuel blends, including D100, chemically similar to diesel fuel, and four other fuel blends containing varying percentages of ethanol and methanol. The objective was to identify the best gasoline blend in terms of emissions, fuel consumption, and engine performance. The simulation results for D100 showed a thermal efficiency of 38.16%, CO emissions of 0.571 g/kg-f, and EINOx of 176 g/Kg-fuel. The fuel mixture (D80E20) with 80% diesel and 20% ethanol was the best suited for engine emissions and performance according to the results for the other fuel mixes. The D80E20 blend had a thermal efficiency of 47.38%, in-cylinder pressure of 79.99 bar, temperature of 1896.70 K, indicated power of 10.49 KW, EINOx of 6g/Kg-fuel, and ISFC of 183.55 g/KW-h. Due to its lower emission value compared to D100 and the other five mixes, D80E20 has a greater thermal efficiency. High oxygen concentration in the fuel blend helps achieve complete combustion, which, in turn, leads to a decrease in unburned hydrocarbons and particulate matter, ultimately resulting in lower emissions.