Technical Paper
The Effect of the Random Inflow Conditions and Initial Conditions to Cycle-to-Cycle Variations Using Detachment Eddy Simulation
2012-09-10
2012-01-1758
The overall goal of all engine researchers is to enhance fuel economy and reduce emissions. To achieve this objective, one should reduce the cycle-to-cycle variations in the combustion process. It is well known that cycle to cycle variations in combustion significantly influence the performance of spark engines. Traditionally, it has been explained as being the result of random fluctuations in equivalence ratio and fluid flow conditions due to the unsteady nature of turbulent flow in the engine. This paper presents a numerical study of the effect of the random inflow conditions and initial conditions to cycle-to-cycle variations in-cylinder flow. This study has been performed with the commercial CFD (computational fluid dynamic) code (FLUENT) coupled with our own development based on UDF facilities given by FLUENT.
