Computational Fluid Dynamics Analysis of Homogeneous Charge Compression Ignition Engine

Abstract

Stringent emission and heavy tax on duty vehicle draw attention of automobile researchers to develop engine with high fuel efficiency and low emission of NOx, CO and unburnt hydrocarbon. The engine concept which combines the benefits of both SI and CI engines is termed as HCCI engine. In the current study, three dimensional model of an engine having inlet and exhaust manifold with valve profile was used for visualizing and analyzing the HCCI combustion strategy using ANSYS 16.2. Engine combustion performance parameters like combustion temperature, pressure, heat release rate and turbulent kinetic energy at different crank angles were considered for evaluation of HCCI mode. Performance was analyzed at various engine speeds (2000–3000 rpm) with same swirl number. Simulation results show that increment in wall adjacent temperature and mass average static pressure is achieved at higher engine speed in HCCI mode due to homogeneity of air–fuel mixture, however exergy destruction rate was noticed at all engine speeds.