This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Simple Auto-Ignition Model for Three-Dimensional Diesel Combustion Computations
Published January 09, 1996 by Institution of Mechanical Engineers in United Kingdom
Multidimensional diesel combustion calculations require the simulation of the low temperature chemistry during the ignition delay period.
The correct prediction of the ignition delay time is very important to properly reproduce the relative weight of the premixed and diffusive phases of the diesel combustion process. On the other hand this is very significant to evaluate the NOx and HC emissions.
In the present paper different formulations were used to simulate the low temperature chemistry, using multi-step schemes, as well as a simplified phenomenological approach, based on an experimental correlation. The different methods investigated were implemented in the KIVA II code and used to perform 3D combustion calculations in a number of test cases. The tests are referred to a direct injection diesel engine running in different operating conditions and burning fuels with different cetane numbers. The numerical results are analyzed in comparison with the corresponding experimental measurements.