Numerical Simulation of Cold Flow Analysis of Internal Combustion Engine with Double-Lobed Piston Head

摘要

The demand for cost-effective eco-friendly automobiles is increasing day by day because of its impact on reducing air pollution. We cannot compromise with the usage of automobiles and its advancements as it is inevitable for the development. The only way to combat the problem of air pollution is the reduction of the harmful emissions, and it can be achieved by introducing new innovative engine designs which can give a complete combustion. This paper proposes a new double-lobed piston head design which can give better in-cylinder air flow patterns (Tumble and Swirl), turbulence and air-fuel mixing for an IC engine and thereby result in complete combustion. The in-cylinder airflow patterns developed during the intake stroke and the compression stroke of this newly designed IC engine were analyzed and compared with that of conventional flat piston head engine using the numerical simulation of cold flow analysis. No change in tumble was observed which means the piston head configuration has a negligible effect on the tumble. But there is a 66.67% increase in swirl during intake stroke and 91.47% increase during the compression stroke. This increased swirl creates high turbulence and thereby increasing the engine's combustion efficiency. These results proved the efficiency of the double-lobed piston head configuration in providing better engine performance and thereby reducing the air pollution.