| Nowadays,the world's energy situation is mainly faced with the problems of energy shortage and environmental pollution.As the mainstay of heavy industry,the automobile industry has serious energy consumption and environmental pollution.However,electric vehicles and other new energy vehicles cannot replace the use of traditional fuel vehicles in a short period of time,so it is urgent to improve the current situation of the fuel vehicle industry.Therefore,laminar combustion characteristics of methane(main components of natural gas)and iso-octane(main components of gasoline)blended fuels are investigated by Chemkin-Pro software.In this paper,methane and isoo-ctane are mixed according to the methane composition of 0%,30%,50%,70% and 100%.The laminar combustion characteristics of the fuel at the equivalence ratio of 0.7-1.3,the initial temperature of 300k-900 k and the initial pressure of 1atm-80 atm are studied.The flame structure,the molar distribution of H and OH radicals,the sensitivity of velocity and the formation rate of radicals are studied by gas-phase chemical kinetic analysis,and the essential reason of the change of laminar combustion velocity is explored.The main conclusions are as follows: The variation of characteristics of laminar combustion including laminar burning velocity,adiabatic combustion temperature,flame thickness with equivalence ratio,fuel mixing ratio,initial pressure and initial temperature.The correlations of laminar combustion velocity of mixed fuel under different initial conditions are obtained by data fitting.The reason of the influence of different initial conditions on the laminar combustion velocity of the mixed fuel was further explored by chemical kinetics analysis. |
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