Abstract
To improve the combustion chamber shape that can decrease the directed injection (DI) diesel emission, the theories of DI diesel spray, combustion and pollutant formation model are analyzed and implemented based on the Computational fluid dynamics (CFD) code FIRE. Results show that the chamber with contracting orifice can get stronger squish swirl intensity. The results of the verification studies show a good accordance with the measurements and reveal that the individual processes of spray evolution, combustion and pollutant formation are well captured in FIRE. Finally, based on the analyzing and comparing of the calculation results of different chambers, a combustion chamber of contracting orifice geometry with lower emission is proposed.
| Original language | English |
|---|---|
| Pages (from-to) | 17-21 |
| Number of pages | 5 |
| Journal | Journal of Beijing Institute of Technology (English Edition) |
| Volume | 15 |
| Issue number | 1 |
| Publication status | Published - Mar 2006 |
Keywords
- Combustion
- Directed injection diesel engine
- Emission
- Spray
- Three-dimensional computational fluid dynamics calculation