Numerical 3-D simulations are performed for the improvement of the new direct injection gasoline engine. A solution based local grid refinement method has been developed in order to reduce the CPU time. This method has been incorporated into the CFD program (STAR-CD) with in-house spray and combustion models. Calculation results were compared with the experimental data taken by the LIF technique, and good agreement was obtained for the mixture formation and combustion processes. Some calculations were carried out for the fuel-air mixture formation process during late injection stratified combustion and the following results were obtained. The unburnt fuel has a tendency to remain in the side of the piston cavity at the latter part of the combustion period. To reduce the amount of unburnt fuel, it was shown that the combination of a thin thickness fan spray and compact cavity forms a spherical mixture, suitable for combustion.
Numerical Study of Mixture Formation and Combustion Processes in a Direct Injection Gasoline Engine with Fan-Shaped Spray
Sae Technical Papers
SAE 2001 World Congress ; 2001
2001-03-05
Conference paper
English
Automotive engineering | 2001
|Spray propagation and mixture formation in an air guided direct injection gasoline engine
Automotive engineering | 2000
|Spray propagation and mixture formation in an air guided direct injection gasoline engine
British Library Online Contents | 2000
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