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Abstract
Experimental Analysis of Mixture Formation Process in Gasoline Spray with Laser Induced Exciplex Fluorescence Technique
Highlights
In direct injection gasoline engines, the fuel is injected into the cylinder and forms mixture with the ambient gas through atomization and evaporation
Various methods have been proposed for the measurement of evaporating fuel sprays, such as Rayleigh scattering [1], laser-induced fluorescence (LIF) [2], laser-induced exciplex fluorescence (LIEF) [3], which obtain cross-sectional information, Infrared extinction scattering (IRES) [4], and laser lights absorbed and scattered (LAS) [5], which obtain line of sight information
The vapor concentration in the two-phase mixture region of liquid and vapor was quantified by image processing that consider the fluorescence crosstalk of the liquid and vapor phases [7]
Summary
In direct injection gasoline engines, the fuel is injected into the cylinder and forms mixture with the ambient gas through atomization and evaporation. In order to quantify the vapor concentration of only vapor phase, the dependence of the monomer fluorescence on vapor concentration, ambient pressure, and ambient temperature was tested [7] From these results, the concentration distribution in the spray and the mean temperature distribution of the mixture were calculated from the fluorescence intensity by convergence calculation of the vapor concentration and the mean luorescence intensity a.u
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