Study On The Soot Characteristics Of Furan Gasoline Instead Of Mixed Fuel Under The Action Of Magnetic Field

Increasing energy and environmental issues are attracting the attention of a new generation of biofuels,such as furan-based biofuels that can be blended with gasoline or as alternative fuels.As the composition of gasoline is very complicated,the general use of gasoline model alternative fuel instead of basic experimental research.Soot particles resulting from incomplete combustion of fuels exacerbate environmental problems,research on the formation mechanism and control of soot particles has become an international research hotspot.Therefore,this paper is based on the inverse diffusion flame(IDF)test bench,2,5-dimethylfuran(DMF)as a blend fuel,n-heptane and isooctane for the gasoline model instead of the fuel(Primary Reference Fuel,PRF).The relative properties and variation of mixed fuel soot particles under different conditions were studied by transmission electron microscopy(TEM),X-ray diffraction(XRD)and thermos-gravimetric analysis(TGA),etc.It provides a theoretical basis for the application of controlling DMF and soot.Firstly,the difference of soot characteristics of different DMF blending ratios,different soot deposition height and different spatial positions of flame were analyzed through n-heptane/DMF IDF experiment.The results showed that the addition of DMF could:larger soot produces quality,larger fringe length,lower tortuosity and oxidation reactivity.In the different depositional heights,the amount of soot produced by the mixed fuel increased with the increase of the height,and the particles tended to decrease.The fringe length gradually decreased and the tortuosity gradually increased.The corresponding oxidation reactivity has become stronger.In the different positions of the flame,it was found that the shape and maturity of soot particles on the flame edge line were significantly different from those on the flame center line.The fringe length tended to decrease and the tortuosity has an increasing trend as the height of the flame increased.Secondly,the effect of magnetic field on the change of the characteristics of fuel soot was studied.The results show that the magnetic field environment set in this paper will increase the soot production of n-heptane and n-heptane/DMF mixed fuel.It can also show:larger fringe length of n-heptane,lower tortuosity and oxidation reactivity;While in a 50%DMF blended fuel,the role of the magnetic field is contrary to the above rules.That is:smaller fringe length,larger tortuosity and oxidation reactivity.In the meantime,the effect of N poles in the setting magnetic field on soot is more pronounced in the above results.Finally,we researched isooctane/DMF IDF experiment.The results show that the influence of DMF mixing ratio,soot deposition height,magnetic field and other factors on the soot characteristics of isooctane/DMF IDF flame is similar to that of the n-heptane/DMF IDF.