Studies on the efficacy of helical port design using computationla fluid dynamics

Abstract

In-cylinder gas motion is the essential parameter that enhances fuel-air mixing and increases the combustion rate and governs the performance and emission of the engine. It also has significant impact on heat transfer. Angling the intake port into various angles is the one of the method to enhance swirl motion inside the combustion chamber. In this project, direct port is converted into helical port to analyze the air motion inside the engine cylinder. In order to analyze the effect of helical port design the various flow parameters such as swirl ratio, flow coefficient, and turbulent kinetic energy are calculated. By angling the intake port, swirl generation during suction stroke is comparatively larger than direct port. A commercial CFD software STAR-CCM is used to analyze the in-cylinder air motion.