The maximum extent of liquid-phase fuel penetration into in-cylinder gases is an important parameter in compression-ignition (CI) engine design. Penetration of the fuel is needed to promote fuel-air mixing, but over-penetration of the liquid phase and impingement on the bowl wall can lead to higher emissions. This maximum liquid-phase fuel penetration, or “liquid length,” is a function of fuel properties, in-cylinder conditions, and injection characteristics.The goal of this study was to measure and correlate the liquid lengths of fuels with wide physical property variations. The fuels were injected into a large range of in-cylinder temperature (700 to 1300 K) and density (3.6 to 59.0 kg/m3) conditions, at an injection pressure (140 MPa) that is characteristic of those provided by current high-pressure injection equipment. Liquid lengths were measured for the following nine fuels: Fischer-Tropsch diesel (FTD); biodiesel (B100); methanol (M100); a non-oxygenated, hydrocarbon gasoline (HCG); an oxygenated, reformulated gasoline (RFG); a blend of 85% methanol with 15% gasoline (M85); n-hexadecane (NHD); heptamethylnonane (HMN); and Phillips #2 reference diesel fuel (DF2).An engineering correlation for predicting liquid lengths of arbitrary fuel blends was developed for a vaporizing fuel jet. The correlation, when applied to the complete matrix of fuels and in-cylinder conditions, has a standard deviation of 12%. The standard deviation can be reduced to 6% by applying the correlation to a subset of the test matrix more representative of conditions encountered in modern-technology CI engines.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Measurements of Fuel Effects on Liquid-Phase Penetration in DI Sprays1


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    International Congress & Exposition ; 1999



    Erscheinungsdatum :

    1999-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Liquid-Phase Fuel Penetration in Diesel Sprays

    Siebers, Dennis L. | SAE Technical Papers | 1998


    Liquid-phase fuel penetration in diesel sprays

    Siebers,D.L. / Sandia National Lab.,Livermore,US | Kraftfahrwesen | 1998


    Measurement of fuel effects on liquid-phase penetration in direct injection sprays

    Higgins,B.S. / Mueller,C.J. / Siebers,D.L. et al. | Kraftfahrwesen | 1999


    Diesel nozzle geometry influence on spray liquid-phase fuel penetration in evaporative conditions

    Payri, R. / Salvador, F.J. / Gimeno, J. et al. | Tema Archiv | 2008