Figures (8)  Tables (1)

    • Figure 1. 

      Schematic diagram of the shock tube system.

    • Figure 2. 

      Definition of ignition delay time.

    • Figure 3. 

      Comparison of experimental (dots) and simulated (lines) results of IDTs for 100% H2​, 50% H2​/50% CH4​, and 30% H2​/70% CH4​ at 1.2 and 5.0 atm.

    • Figure 4. 

      Reaction pathways of 100% H2, and 30% H2/70% CH4 at 1,100 K, and 5.0 atm.

    • Figure 5. 

      Sensitivity analysis of IDTs for 100% H2, 50% H2/50% CH4, and 30% H2/70% CH4 under conditions of 1,100 K and 5.0 atm.

    • Figure 6. 

      Peak concentrations of H, O, OH, and CH3 radicals at 1,100 K and 5.0 atm for 100% H2 and 50% H2/50% CH4.

    • Figure 7. 

      Effect of CO2 on ignition delay times of 50% H2/50% CH4 mixture.

    • Figure 8. 

      Sensitivity coefficients of IDTs under CO2 atmosphere.

    • No. Equivalence ratio XH2/(XH2 + XCH4) H2 (%) CH4 (%) O2 (%) Dilution gas (%) Pressure (atm)
      1 0.50 1.00 5.00 0.00 5.00 90.00 Ar 1.20
      2 0.50 1.00 5.00 0.00 5.00 90.00 Ar 5.00
      3 0.50 0.50 1.43 1.43 7.14 90.00 Ar 1.20
      4 0.50 0.50 1.43 1.43 7.14 90.00 Ar 5.00
      5 0.50 0.30 0.73 1.71 7.56 90.00 Ar 1.20
      6 0.50 0.30 0.73 1.71 7.56 90.00 Ar 5.00
      7 0.50 0.50 1.43 1.43 7.14 90.00 CO2 1.20

      Table 1. 

      Experimental conditions for the ignition delay time measurements.