Three Dimensional Modeling of Combustion and Soot Formation in an Indirect Injection Diesel Engine 900254

The three dimensional computer code KIVA is applied to calculate combustion in an IDI Diesel engine.
The ignition delay is described by a four step kinetics model involving a generalized radical.
The high temperature combustion phase is computed using a model due to Magnussen.
The model of soot formation is due to Tesner.
Finally, an extension of Magnussen' s combustion model allows one to describe soot formation in a turbulent environment.
In the present computations, a classical k-ε turbulence model and the associated laws of the wall are incorporated.
Comparisons between computational and experimental results are emphasized.
The results under four engine operating conditions are found to be encouraging and give hope for the code being predictive soon. However, such aspects as e.g validation of the heat tansfer calculation at the walls and nitric oxide formation have not been taken into account thus far.


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