Research Article
A Detailed Numerical Study of NOx Kinetics in Counterflow Methane Diffusion Flames: Effects of Fuel-Side versus Oxidizer-Side Dilution
Table 1
Conditions of diluted methane/air counterflow diffusion flames with and without H2O or CO2 replacement of N2, 400 K, 1 atm.
| No. | Fuel stream composition (vol%) | Oxidizer stream composition (vol%) | Remark | CH4 | N2 | H2O | CO2 | O2 | N2 | H2O | CO2 |
| Case 1 | 50 | 50 | 0 | 0 | 21 | 79 | 0 | 0 | Baseline H2O dilution (fuel-side) | Case 2 | 50 | 40 | 10 | 0 | 21 | 79 | 0 | 0 | Case 3 | 50 | 30 | 20 | 0 | 21 | 79 | 0 | 0 | Case 4 | 50 | 10 | 40 | 0c | 21 | 79 | 0 | 0 | Case 5 | 50 | 40 | 0 | 10 | 21 | 79 | 0 | 0 | CO2 dilution (fuel-side) | Case 6 | 50 | 30 | 0 | 20 | 21 | 79 | 0 | 0 | Case 7 | 50 | 10 | 0 | 40 | 21 | 79 | 0 | 0 | Case 8 | 50 | 50 | 0 | 0 | 21 | 69 | 10 | 0 | H2O dilution (air-side) | Case 9 | 50 | 50 | 0 | 0 | 21 | 59 | 20 | 0 | Case 10 | 50 | 50 | 0 | 0 | 21 | 39 | 40 | 0 | Case 11 | 50 | 50 | 0 | 0 | 21 | 69 | 0 | 10 | CO2 dilution (air-side) | Case 12 | 50 | 50 | 0 | 0 | 21 | 59 | 0 | 20 | Case 13 | 50 | 50 | 0 | 0 | 21 | 39 | 0 | 40 |
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