In order to analyze the effects of nozzle geometry on the structure of fuel sprays, quantitative x-ray measurements have been performed on sprays from nozzles with different degrees of hydro-grinding. The two nozzles were measured at injection pressures of 500 and 1000 bar in an ambient environment of 1 bar nitrogen gas. Time-resolved x-radiography was used to measure the two-dimensional mass distributions of the spray as a function of time for the entire spray event. The initial mass flow through the nozzles was determined from the x-ray data, the nozzles showed no appreciable differences in the early part of the injection event. The transverse mass distributions were fit with Gaussian curves, and the assumption of axisymmetry was used to calculate the volume fraction of each spray. It was observed that the nozzle which had undergone extensive hydro-grinding generated a more dense spray than the sharp-edged nozzle at an injection pressure of 1000 bar.


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    Titel :

    X-Ray Absorption Measurements of Diesel Sprays and the Effects of Nozzle Geometry


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    2004 SAE Fuels & Lubricants Meeting & Exhibition ; 2004



    Erscheinungsdatum :

    2004-06-08




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    X-ray absorption measurements of diesel sprays and the effects of nozzle geometry

    Powell,C.F. / Ciatti,S.A. / Cheong,S.K. et al. | Kraftfahrwesen | 2004


    Modeling the Effects of Injector Nozzle Geometry on Diesel Sprays

    von Kuensberg Sarre, Christopher / Reitz, Rolf D. / Kong, Song-Charng | SAE Technical Papers | 1999


    Modeling the effects of injector nozzle geometry on diesel sprays

    von Kuensberg Sarre,C. / Kong,S.C. / Reitz,R.D. et al. | Kraftfahrwesen | 1999


    Measurements in diesel sprays

    Arcoumanis,C. / Cossali,E. / Magini,R. et al. | Kraftfahrwesen | 1989


    Microscopic characterization of diesel sprays at VCO nozzle exit

    Lai,M.C. / Wang,T.C. / Xie,X. et al. | Kraftfahrwesen | 1998