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The fast ignition and stable combustion of fuel is a very important problem in designing gas turbine combustor. In this paper, the detailed fuel reaction process and primary influence factors for ignition delay time were studied by the chemical kinetic mechanisms. The chemical kinetic mechanisms of RP-3 aviation kerosene was put forward by analyzing its alternative fuel consisted of 80% decane and 20% 1,2,4-trimethylbenzene(volume fraction).The results show that the ignition process of RP-3 aviation kerosene was divided two phases, the first phase is macromolecular oxidized slowly, the second phase is small molecules reacted strongly. The primary influence factors for ignition delay time are initial air temperature and the concentration of OH,O and H, and the effect extent of three particles was H, O and OH in turn. Chemical Kinetic Mechanisms RP-3 aviation kerosene is primary fuel for gas turbine combustor in our country. It is one kind of hydrocarbon fuel consisted of 92.1% saturated hydrocarbon and 7.9% aromatic compounds (volume fraction). The physical and chemical characteristics of RP-3 aviation kerosene[1] are similar to Jet-A aviation kerosene[2] aboard, so the chemical kinetic mechanisms model of RP-3 aviation kerosene can be put forward by analyzing Jet-A aviation kerosene mechanisms model. By comparison with different kinds of Jet-A aviation kerosene alternative fuel, the alternative fuel proposed by Honnet consisted of 80% decane and 20% 1,2,4-trimethylbenzene(volume fraction)[3] is chosen as the alternative fuel for RP-3 aviation kerosene. Then the chemical kinetic mechanisms model of the alternative fuel come to be the mechanisms model of RP-3 aviation kerosene. In order to consider the NOx formation in combustion, the NOx mechanisms model[4] proposed by Hewson and Bollig is added to mechanisms model of RP-3 aviation kerosene. After that, one mechanisms model including 131 species and 1020 reactions is put forward, which is called Honnet model. The scope of application of the mechanisms model is 700~3000K and 1~25atm. The ignition delay time and laminar flame speed are calculated by Honnet model in different conditions, the prediction of the model agree well with experiment data[5], look figure1 and figure2. In conclusion, the alternative fuel model for RP-3 aviation kerosene is correct.

The Simulation Investigation of RP-3 Aviation Kerosene Ignition Characteristics