Abstract
In order to investigate the effects of EGR rates on soot formation and oxidation mechanisms, a nine-step phenomenological soot model was revised and implemented into KIVA-3V code to describe the combustion and emission characteristics of a high-pressure constant volume chamber with various initial ambient oxygen concentrations. The results show that the revised nine-step phenomenological soot model successfully predicted soot mass concentration and spatial distributions. For heavier rates of EGR, the concentration of C2H2 and soot precursor did not increase a lot. However, Oxygen and OH radicals, which are essential reactants of soot oxidation mechanism, were found to get to eliminate. Therefore, the increase of soot particles with decreasing ambient oxygen concentrations should be the results of suppressed soot oxidation mechanism.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1393-1397 |
| Number of pages | 5 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 34 |
| Issue number | 7 |
| State | Published - Jul 2013 |
Keywords
- Constant volume chamber
- Numerical simulation
- Phenomenological model
- Soot mechanism
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering