Cycle-to-Cycle Variations Based Unsteady Effects on Spray Combustion in Internal Combustion Engines by Using LES

2012-01-0399

04/16/2012

Event
SAE 2012 World Congress & Exhibition
Authors Abstract
Content
Cycle-to-cycle variations of combustion processes strongly affect the emissions, specific fuel consumption as well as work output. Especially Direct Injection Spark-Ignition (DISI) engines are very sensitive to cyclic fluctuations within the combustion chamber. Multi-cycle Large Eddy Simulation (LES) based analysis has been used for investigating unsteady effects of spray combustion processes and misfires. A realistic four-stroke DISI internal combustion engine configuration was taken under consideration. The effects of variable spray boundary conditions on spray combustion are discussed first. A qualitative analysis of the intensity of cycle-to-cycle variations of in-cylinder pressure is presented for various combinations of injection parameters and ignition points. Finally, the effect of ignition probability and analysis of misfires are pointed out. The described above processes were discussed in terms of mean and standard deviation of temperature, velocity and pressure.
Meta TagsDetails
DOI
https://doi.org/10.4271/2012-01-0399
Pages
15
Citation
Goryntsev, D., Sadiki, A., and Janicka, J., "Cycle-to-Cycle Variations Based Unsteady Effects on Spray Combustion in Internal Combustion Engines by Using LES," SAE Technical Paper 2012-01-0399, 2012, https://doi.org/10.4271/2012-01-0399.
Additional Details
Publisher
Published
Apr 16, 2012
Product Code
2012-01-0399
Content Type
Technical Paper
Language
English