Numerical analysis of diesel combustion with high egr and high boost pressure using a multi-dimensional cfd code coupled with complex chemistry analysis

Keishi Takada, Jin Kusaka

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this study, fuel ignition timing parameters, in-cylinder pressure and heat release rates, and quantities of major exhaust gas emissions from a diesel engine were calculated using multi-dimensional CFD codes coupled with complex chemistry analysis In addition, a sensitivity analysis of parameters was conducted to identify the major variables affecting these diesel combustion parameters. Firstly, diesel combustion analysis under typical operating conditions was carried out to validate the analytical methods used in the study, and then the effects of intake gas variables (e.g. temperature, and pressure) were investigated in detail in the sensitivity analysis. The results show that the main determinant of ignition timing in the engine is the spatial density of oxygen in the cylinder. This finding indicates that diesel combustion with high EGR and high boost pressure can provide both high thermal efficiency and low emissions.

Original languageEnglish
Pages (from-to)1037-1048
Number of pages12
JournalSAE International Journal of Fuels and Lubricants
Volume1
Issue number1
DOIs
Publication statusPublished - 2009 Apr

Fingerprint

Numerical analysis
Engine cylinders
Sensitivity analysis
Ignition
Exhaust gases
Gas emissions
Diesel engines
Computational fluid dynamics
Engines
Oxygen
Gases
Temperature
Hot Temperature

ASJC Scopus subject areas

  • Fuel Technology
  • Pollution

Cite this

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abstract = "In this study, fuel ignition timing parameters, in-cylinder pressure and heat release rates, and quantities of major exhaust gas emissions from a diesel engine were calculated using multi-dimensional CFD codes coupled with complex chemistry analysis In addition, a sensitivity analysis of parameters was conducted to identify the major variables affecting these diesel combustion parameters. Firstly, diesel combustion analysis under typical operating conditions was carried out to validate the analytical methods used in the study, and then the effects of intake gas variables (e.g. temperature, and pressure) were investigated in detail in the sensitivity analysis. The results show that the main determinant of ignition timing in the engine is the spatial density of oxygen in the cylinder. This finding indicates that diesel combustion with high EGR and high boost pressure can provide both high thermal efficiency and low emissions.",
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