Abstract
The laminar flame characteristics of nature gas-hydrogen-air mixtures were studied in a constant volume combustion homh at normal temperature and pressure. Laminar burning velocities and Markstein lengths were obtained at various ratios of hydrogen to natural gas (volume fraction form 0% to 100%) and equivalence ratios (from 0.6 to 1.4). The influences of stretch rate on flame propagation were also analyzed. The results show that laminar burning velocity increases exponentially with the increase of hydrogen fractions in the mixture, while the Markstein length decreases and flame instability increases with the increase of hydrogen fractions in the mixture. For a fixed hydrogen fraction, the Markstein length shows an increase and flame stability increases with the increase of equivalence ratios. Based on the experimental data, a formula for calculating the laminar burning velocities of natural gas-hydrogen-air mixture is proposed.
| Original language | English |
|---|---|
| Pages (from-to) | 97-103 |
| Number of pages | 7 |
| Journal | Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) |
| Volume | 24 |
| Issue number | 2 |
| State | Published - Mar 2006 |
Keywords
- Constant volume combustion bomb
- Laminar burning velocity
- Markstein length
- Stretch