Performance, Combustion, and Emission Comparisons of a High-Speed Diesel Engine Fueled with Biodiesel with Different Ethanol Addition Ratios Based on a Combined Kinetic Mechanism

In this work, different ethanol ratios (5%, 10%, 15%, and 20%) blended with biodiesel were used to investigate the effects of addition on engine performance, combustion, emission characteristics a high-speed diesel in terms brake power, specific fuel consumption, thermal efficiency, cylinder pressure, temperature, heat release rate, NOx, CO, soot emissions. First, three-dimensional CFD model was established by AVL-Fire combined CHEMKIN code. Then, an improved kinetic mechanism 430 reactions 122 species developed combining three-component combustion accurately simulate processes. The results indicated that compared biodiesel, maximum consumption increased 6.08%, efficiency 2.09% for fuel. addition, NOx CO emissions EE20 reduced 29.32% 39.57% at full load. Overall, can significantly decrease pollution