Reaction Kinetics Research Of Numerical Simulation Alternative Fuel For Aviation Kerosene

Three new surrogate fuels (n-decane, the mixed fuel of n-decane and1,2,4-trimethylbenzene, n-decane and toluene) for kerosene(Jet A-1) were provided, anddetailed reaction mechanisms (67species and344reactions for n-decane,118species and527reactions for the mixed fuel of n-decane and1,2,4-trimethylbenzene,84species and440reactions for the mixed fuel of n-decane and toluene) for the ignition and combustion of thesethree surrogate fuels were compiled. The detailed reaction mechanism of the ignition andcombustion of a surrogate fuel (n-decane) for kerosene was reduced by adopting net reactionrate analysis and sensitivity analysis, and a reduced mechanism (including50species and118reactions) was gained. The ignition characteristics and the premixed combustion processes ofthese three surrogate fuels in the shock tube and the perfectly stirred reactor were simulatedespecially, and the simulation results compared with the experimental data. Furthermore, thecombustion process and the formation of emissions and active species in the individual tubeof air-turbine combustor were analyzed by combining this reduced reaction mechanism intothe CFD computational software (Fluent), and the computational results were compared withthat of the global reaction mechanism of C12H23fuel. The results show that these two mixedfuels represent the ignition and combustion characteristics of Jet A-1more accurately thann-decane single fuel. At the same time, the effect of volume percentage of two species in themixed fuel on the ignition and premixed combustion characteristics are significantly. Theresults show that the ignition delay time, and the shape of the profiles of the mole fractions ofthe reactants, the major combustion products simulated using the reduced mechanism areagreed well with the experimental data. Furthermore, compared with the global reactionmechanism of C12H23fuel, the combustion and emissions characteristics of the individualflame tube can analyzed well by adopting the reduced reaction mechanism of n-decane in theindividual flame tube.