CFD Engine Applications at FIAT Research Centre

摘要

The CFD (computer fluid dynamic) simulation of the complete engine cycle of the 2400 cm~3 JTD 10 V engine for the Alfa Romeo 156 is presented. The intake stroke analysis has followed a procedure usually applied at CRF for gasoline engines. Spray and Combustion analysis at the selected operating condition of 3500 tr/min and 13 bar BMEP (brake mean effective Pressure) has given results in fair agreement with the experimental data, but revealed the need of more accurate Models for the initial phase of combustion. Finally, the simulation of the exhaust phase has required great care In the set-up of the initial field and boundary conditions. Flow field characteristics are discussed at two crank Angles, corresponding to peak values f the exhaust mass flow rate.