Abstract
An experimental study on the effect of hydrogen fraction and EGR rate on combustion characteristics of a spark-ignition engine fuelled with natural gas-hydrogen blends was conducted. The results show that, for a specified hydrogen fraction, the flame development duration, the rapid combustion duration and the total combustion duration are increased with the increase of EGR rate. At a given EGR rate, the flame development duration, the rapid combustion duration and the total combustion duration are decreased with the increase of hydrogen fraction in the blends. Hydrogen addition gives the larger influence on the flame development duration than the rapid combustion duration. Hydrogen addition into natural gas decreases the coefficient of variation of the indicated mean effective pressure and the effectiveness becomes more obviously at high EGR rate.
| Original language | English |
|---|---|
| Pages (from-to) | 399-406 |
| Number of pages | 8 |
| Journal | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) |
| Volume | 28 |
| Issue number | 5 |
| State | Published - Sep 2010 |
| Externally published | Yes |
Keywords
- Combustion characteristics
- Exhaust gas recirculation
- Hydrogen
- Natural gas
- Spark ignition engine