Study On Combustion And Emission Of Biofuel Based On Chemical Reaction Kinetics In Small Aeroengine

In recent years,energy shortages and environmental pollution have been the focus of attention in various industries.Therefore,it is very important to study the biofuel in the supplementary fuel of aviation kerosene.Aviation biofuel have advantages over aviation kerosene.They reduce the pressure of aviation kerosene shortage and the aviation's greenhouse gas emissions,which is of great significance to the sustainable and healthy development of the aviation industry and china's ecological environment.The composition of aviation kerosene is extremely complex,and it is difficult to study all its components.Based on the experience and other literatures,this paper uses n-decane as a one-component substitute for aviation kerosene to carry out related research.By comparing and analyzing various biofuel,n-butanol has good physical and chemical properties and can be applied to the combustion process in aeroengines.Therefore,this study selects biofuel n-butanol for research.The detailed chemical reaction mechanism of n-butanol and n-decane was simplified by temperature sensitivity and rate of production method.The method was compared with the simplified method of DRGEP.The study found that the simplified mechanism of the combination of temperature sensitivity and reaction rate is more in line with demand.A 3D model of combustion chamber was established,and the unstructured grid was divided,and the grid was verified for independence.The numerical simulation of the two fuels was carried out by using a simplified chemical reaction mechanism of n-butanol and n-decane.The results show that the two fuel flow fields and temperature filed are consistent,the outlet temperature of n-butanol decreased by 129K compared with n-decane,the CO₂ and NO_x emissions decreased by 22%and 84%,and the combustion efficiency and outlet temperature distribution coefficients were both 90%and 0.14.