Numerical investigation wall impingement and flow field characteristics with the dependence on boost pressure

Boost pressure by applying superchargers, turbochargers, or both are the recent trend to improve engine efficiency and emission problem. In the present study, the effect of boost pressure on a point of view of the impinging LFF and flow field characteristics was investigated. Full 3D unsteady Eulerian-Lagrangian two-phase numerical simulations were carried out to predict the flow field characteristics as functions of boost pressures. Experimental data were coupled for providing boundary and initial conditions for the benchmark case. The results showed that the increment of boost pressure has no affection to the evaporation of fuel amount. The fuel atomization process is improved as boost pressure increases during the compression stroke. Boost pressure can also prevent LFF which by varying valve strategies such as valve timing and valve lift.