Abstract
The distribution of fuel sprays and mixture in a combustion chamber with twin shaped semi-premixed diesel combustion were analyzed with CFD code. Combustion is realized with a combination of the premixed combustion with the first injection and the spray combustion with the second injection during or just after the premixed diesel combustion. The CFD code suggested that in a combustion chamber dividing the first and the second fuel sprays to upper and lower zones of the chamber, effected with a projection provided in the combustion chamber, the second injection spray injected into the burned zone of the first injection was significantly reduced compared with that in an ordinary re-entrant combustion chamber.
