Numerical Simulation of a DI Diesel Engine in Full and in Partial Loads

Mech. Eng. Group Mech. Eng. Group Mech. Eng. Dep’t.Science & Research BranchIslamic Azad Univ. Imam Hossain Univ. Tabriz Univ.ABSTRACTIn this work, numerical simulation of flow with spray and combustion has been performed in a direct injection diesel engine. The grid was structured and all phenomena that affect the operation of a diesel engine, such as injection, evaporation, droplet collision, droplet impinging on walls, heat transfer to walls, combustion, ete were taken into account. The kinetic of combustion and the effects of turbulence on fuel-air mixture and on rate of reaction were considered. The KIVA-3V code (with some changes) was used for the computations. The prediction of performance factors, pollution and energy release rate, as well as the investigation of input load effects on performance and pollution were the main purpose of this work. The geometry and operation data of OM355 engine were introduced as input data and the results of simulation and experiment were compared, which were relatively close.