DefinePK

Abstract

The rapid compression machine was used for the wide observation region. A number of researchers were conducted the experiments to study on the mixture formation and combustion process was performed in Rapid Compression Machine (RCM). This research shows the injector nozzle geometries play a significant role in flow characteristics, atomization and formation of fuel-air mixture in order to improve combustion performance, and reduce some pollutant products from internal combustion engine system. The aim of this research is to determine the effects of high pressure on flow characteristics of the injector by using Computational fluid dynamics (CFD). Multiphase of volume of fluid (VOF) cavitating flow inside nozzles are determined by means of transient simulations and two-fluid approach is used for performing mixing of Coconut palm oil and air. Nozzle flow simulations resulted that cavitation area is strongly dependent on the nozzle conical injector. Conical hole with k-factor of 2 provides higher flow velocity and turbulent kinetic energy. The results show that the premix injector nozzle conical shape gives impact to the flow characteristics and indirectly affects the emission of the internal combustion engine system.