Application of LES for Analysis of Unsteady Effects on Combustion Processes and Misfires in DISI Engine
Cycle-to-cycle variations of combustion processes strongly affect the emissions, specific fuel consumption and work output. Internal combustion engines such as Direct Injection Spark-Ignition (DISI) are very sensitive to the cyclic fluctuations of the flow, mixing...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2013-10-01
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| Series: | Oil & Gas Science and Technology |
| Online Access: | http://dx.doi.org/10.2516/ogst/2013125 |
| Summary: | Cycle-to-cycle variations of combustion processes strongly affect the emissions, specific
fuel consumption and work output. Internal combustion engines such as Direct Injection
Spark-Ignition (DISI) are very sensitive to the cyclic fluctuations of the flow, mixing
and combustion processes. Multi-cycle Large Eddy Simulation (LES) analysis has been used
in order to characterize unsteady effects of combustion processes and misfires in
realistic DISI engine. A qualitative analysis of the intensity of cyclic variations of
in-cylinder pressure, temperature and fuel mass fraction is presented. The effect of
ignition probability and analysis of misfires are pointed out. Finally, the fuel history
effects along with the effect of residual gas on in-cylinder pressure and temperature as
well as misfires are discussed.
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| ISSN: | 1294-4475 1953-8189 |