The convection heat transfer rate evaluation of a 6-cylinder in-line tur-bocharged direct-injection diesel engine

Abstract

The in-cylinder convective heat transfer from the combustion gas to the cylinder wall of the combustion chamber has a strong effect on the diesel engine perfor-mances. This study contribute to the knowing in this area for the event of the convective heat transfer from fluid to the cylinder wall of a turbocharged diesel engine with six-cylinder direct injection operating under steady-state con-ditions. An optimized choice of correlation was applied for the evaluation of heat transfer coefficient, which is the Hohenberg's correlation. We developed a computer pro-gram for simulating the operation of a six-cylinder direct injection turbocharged diesel engine, and using a commer-cial GT-Power software to validate the simulation results. The influence of certain engine parameters (thermodynam-ic and geometric) on the convective heat flux and its max-imum value are studied in the present paper. The results show that the convective heat transfer characteristics as a function of crank angle of the six cylinder turbocharged diesel engine strongly depend on the engine injection tim-ing, the cylinder wall temperature and load for the both softwares; FORTRAN and GT-Power.