The Experiment On Ignition Characteristic And Research On Reaction Kinstics Of RP-3Kerosene

The ignition delay times of RP-3kerosene/oxygen/Ar mixtures over the temperaturerange of1100-1600K, at pressures of0.1,0.2and0.3MPa, and for equivalence ratios of0.5,1.0, and1.5were measured behind reflected shock waves, using side-wall pressure and OHauto-luminescence signals measurements in a chemical shock tube. The effects of ignitiontemperature, pressure and equivalence ratio on the ignition delay time were investigated andthe Arrhenius correlations for the ignition delay time of the mixture under different pressuresand equivalence ratios were also deduced. The results show that the correlation for thelogarithm of the ignition delay time of the mixture and the reciprocal ignition temperature islinear under different pressures and equivalence ratios. At the same time, with the ignitiontemperature and pressure increasing and the equivalence ratio decreasing, the ignition delaytime of the mixture is shortening. According to the chemical compositions and physicalproperties of RP-3kerosene, a surrogate fuel includes n-decane, toluene and propylcyclohexane (volume fraction is0.65/0.15/0.2) was provided, and a detailed reactionmechanism (includes150species and591reactions) for this surrogate was developed. Theignition characteristics of this surrogate fuel in the shock tube at various conditions weresimulated using this reaction mechanism, and the simulation results were compared with theexperimental data. The results show that the correlation for the logarithm of the ignition delaytime of RP-3kerosene and the reciprocal ignition temperature is linear under differentpressures and equivalence ratios, and with the ignition temperature and pressure increasingand the equivalence ratio decreasing, the ignition delay time is shortening. At the same time,the ignition delay times of this surrogate fuel computed by this reaction mechanism underdifferent conditions are agreed well with the experimental data of RP-3kerosene. Throughsensitivity analysis, this detailed reaction mechanism was reduced and a reduced reactionmechanism was presented (includes88species and281reactions). The ignition characteristicsof this surrogate fuel in the shock tube at various conditions were simulated using the reduced reaction mechanism, and the simulation results were compared with the experimental data andthe calculated results by the detailed reaction mechanism. The results show that thecorrelation for the logarithm of the ignition delay time of RP-3kerosene and the reciprocalignition temperature is linear under different pressures and equivalence ratios, and with theignition temperature increasing and the equivalence ratio decreasing, the ignition delay time isshortening. At the same time, the ignition delay times of this surrogate fuel computed by thedetailed and reduced reaction mechanisms under different conditions are agreed well with theexperimental data of RP-3kerosene.