Search Results

The potential of single-point turbulence closure models for predicting the flow aerodynamics and turbulence in internal combustion engines (IC) was investigated by computational study of idealized valveless piston/cylinder configurations. The main flow cases considered are the swirling flow in a single stroke rapid compression machine (RCM) with flat and bowl-shaped cylinder head, as well as cyclic compression. Although still remote from a real engine, these configurations enable to analyse joint effects of major phenomena governing the aerodynamics in IC engines: shear, separation, swirl and compression/expansion. Prior to the computation of these engine-like flows, an extensive validation of applied turbulence models was performed in homogeneous and wall bounded shear flows, each featuring separately rotation, swirl and mean flow compression effects.