SIMULATION OF THE TURBULENT-FLOW INSIDE THE COMBUSTION-CHAMBER OF A RECIPROCATING-ENGINE WITH A FINITE-ELEMENT METHOD

This paper presents numerical simulations of turbulent flows during th e intake and the compression strokes of a model engine. The Favre aver age Navier-Stokes equations are solved with a k-epsilon turbulence mod el. The numerical procedure uses a time dependent semi-implicit scheme and a finite element method with a moving mesh (Buffat, 1991, Mao, 19 90). Results of 2-D axisymmetrical calculations with and without inlet swirl are presented and compared to experimental data (Lance et al., 1991). The influence of different turbulence models and the numerical precision of the simulations are also discussed.