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A G-equation Combustion Model Incorporating Detailed Chemical Kinetics for PFI/DI SI Engine Simulations by Liang L., Reitz R.D. is a nonfiction available to read on EtoBox.

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SAE Congress, Detroit, Michigan, April 2, 2006. 6 p. A G-equation-based combustion model incorporating detailed chemical kinetics has been developed and implemented in KIVA-3V for Spark-Ignition (SI) engine simulations for better predictions of flame propagation and pollutant formation. A progress variable concept is introduced into the turbulent flame speed correlation to account for the laminar to turbulent evolution of the spark kernel flame. The flame front in the spark kernel stage is tracked using the Discrete Particle Ignition Kernel (DPIK) model. In the G-equation model, it is assumed that after the flame front has passed, the mixture within the mean flame brush tends to local equilibrium. The subgrid-scale burnt/unburnt volumes of the flame-containing cells are tracked for the primary heat release calculation. An iso-octane kinetic mechanism coupled with a reduced NOX mechanism is used to describe the chemical processes in the post-flame region and the potential heat release from the end gas. The integrated model was used to simulate the combustion process in a Ford four-valve single-cylinder SI engine, which is equipped with both Port-Fuel-Injection (PFI) and Direct-Inje

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Author

Liang L., Reitz R.D.

Language

EN

Category

nonfiction

Subjects

Technology, Transport, Stem