CFD Simulation of Heat Transfer in SI Engine Combustion Chamber

Abstract

The investigation reported in this paper includes the variation of transient and local heat transfer coefficient and heat flux in the combustion chamber of a spark ignition (SI) engine. Heat transfer characteristics are obtained from the Kiva-3v CFD (Computational Fluid Dynamics) code. Instantaneous results including the variations of mean heat transfer coefficient on the piston surface, combustion chamber, and wall of the cylinder are presented. Moreover, variations of the local heat transfer coefficient and heat flux along a centerline on the piston as well as a few locations on the combustion chamber surface are shown. It is illustrated that maximum heat transfer coefficient on the piston and combustion chamber surfaces varies with location and also it is observed that the initial high rate of increase of heat flux at any position is related to the instant of flame arrival at that position. In this work, the major focus is on the determination of the locations where heat flux and heat transfer are maximum.