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Seventh International Symposium on Turbulence and Shear Flow Phenomena
July, 28-31, 2011, Ottawa Convention Centre, Ottawa, Canada

DOI: 10.1615/TSFP7

UNSTEADY EFFECTS ON MIXING AND COMBUSTION PROCESSES IN A REALISTIC IC-ENGINE BY USING LARGE EDDY SIMULATION

pages 1-6
DOI: 10.1615/TSFP7.120
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ABSTRACT

Large eddy simulation (LES) based analysis of the unsteady variations of the in-cylinder flow and their effects on mixing and combustion processes in direct injection spark-ignition engine is presented in this paper. The configuration under study represents a four-stroke internal combustion engine with variable tumble-system. The KIVA-3V code extended to LES has been used to perform 40 consecutive engine cycles in order to characterize cycle-to-cycle fluctuations of the flow field quantities. The impact of parameters of fuel spray injection on mixture preparation and combustion processes is pointed out. For this purpose non-reacting as well as reacting two-phase flows have been analyzed.

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