A two-dimensional model for the simulation of flow and premixed combustion in engines is extended to include a knock sub-model. An autoignition model based upon a degenerately branched chain mechanism /14/ was modified for this purpose. Rapid-compression machine experiments could be reproduced as well as engine knocking tendencies. The coexistence of the new knock model and the overall combustion model of Arrhenius type was arranged by a suitable switch-off criterion for the autoignition reactions. Simulation of pressure waves and respective flowfields under knocking conditions are also shown to be possible. A parametric study of the influence of engine geometry, EGR and swirl on knocking tendency is presented.
Multidimensional Modelling of Knocking Combustion in SI Engines
Sae Technical Papers
SAE International Congress and Exposition ; 1985
1985-02-01
Aufsatz (Konferenz)
Englisch
Multidimensional Modelling of Knocking Combustion in SI Engines
Kraftfahrwesen | 1985
|Knocking of combustion engines : International Symposium
TIBKAT | 1981
|Oscillatory combustion and knocking in SI engines with divided combustion chambers
Kraftfahrwesen | 1985
|Oscillatory Combustion and Knocking in SI-Engines with Divided Combustion Chambers
SAE Technical Papers | 1985
|