Comparative Study Of Diesel And Lpg / Diesel Dual-fuel Mixing Characteristics Of Jet Engine

It is necessary to study the spray in engine cylinder, for the performances on power output, thermal efficiency and emissions of diesel engine are directly influenced by the atomization of fuel. In this work, the macroscopical characteristics of diesel and diesel/LPG sprays are studied through using a digital camera with a high spatial resolution. Based on processing technique for digital image, the droplets photographed, which are at the spray edge, are studied. After a comparison of the characteristics of sprays for different fuels, such as diesel, blend fuels of diesel and LPG with different weight fractions, it is shown that flash-boiling injection (fuel containing dissolved gas) is good for the atomization of fuel. This is proved by the performances of engine as well, i.e. the economic efficiency and some emissions of engine fueled blend fuel become better. Using entropy theory, the droplet distribution of diesel spray is predicted in this paper as well.