Abstract
The ignition delay times of gas-phase kerosene/air mixtures were measured behind reflected shock waves,using side-wall pressure and CH * emission measurements in a heated shock tube.The experiments were performed over the temperature range of 1100-1500 K,at pressures of 2.0×10 5 and 4.0× 10 5 Pa,and for equivalence ratios(Φ)of 0.2,1.0,and 2.0.The effects of temperature,pressure,and equivalence ratio on the ignition delay time were investigated.The global activation energy for kerosene/air varies significantly when the equivalence ratio changes from 0.2 to 1.0,whereas the global activation energy at an equivalence ratio of 1.0 is almost the same as that at 2.0.Three correlations for the ignition delay time under three different equivalence ratios were deduced.The current data were compared with available kinetic mechanisms,and were found to be in good agreement with the predictions of Honnet et al. Chemical mechanism sensitivity analyses for different equivalence ratios were performed;the results showed that the ignition sensitivity at an equivalence ratio of 0.2 is quite different from those at 1.0 and 2.0.
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