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In this paper, computational fluid dynamics (CFD) were employed to a qualitatively and quantitatively study in the behavior of the cold flow in a turbocharged three cylinder spark ignition engine. Dynamic flow experimental characterization was made for low and high engine rotation. One-dimensional modeling software GT-Power was used to calculate the flow pattern generated within the engine cylinder and the results were used as boundary and initialization condition in the CFD model. From the results of the commercial code, volumetric efficiency, in-cylinder pressure and mass are calculated for evaluating the flow development through the four engine strokes, during 4 complete cycles. The CFD model was used as a less expensive alternative to make a deeper study of the flow field.

In this paper, particle image velocimetry (PIV) and computational fluid dynamics (CFD) were employed to a qualitatively and quantitatively study in the behavior of the intake-generated steady flow in a four valve spark ignition single cylinder research engine. Steady flow experimental characterization was made for different intake valve lift values. PIV was used to investigate the flow pattern generated within the engine cylinder. The measurements were taken in the symmetry vertical plane between the inlet and outlet valves. These same conditions were modeled using Star-CCM+ commercial package. The CFD model was used as a less expensive alternative to make a deeper study of the flow field. Velocity fields and intake valves discharge coefficient were compared and analyzed, resulting in a good correlation in relation to the optical experiment.