Mixture formation plays an important role for combustion and pollution formation in Diesel sprays. In particular air/fuel ratio (AFR) and temperature of the mixture short before ignition are crucial for these processes. Thus, these two quantities were measured quantitatively using 1-d spontaneous Raman scattering in this work. In addition, 1-d and 2-d Mie scattering was applied to visualize the distribution of the fuel droplets. 1-d and 2-d laser induced fluorescence (LIF) was also used to measure oxygen and fuel in a qualitative way in this work. The common rail Diesel injector was installed in a combustion vessel, in order to provide nearly quiescent high-pressure and high-temperature conditions. N-decane was used as the fuel, because it is a commonly used model fuel for standard Diesel fuel. It was doped with three different tracers with different boiling points in consecutive experiments in the case of 2-d LIF measurements. The Diesel spray is analyzed by combining the qualitative 2-d Mie and LIF images with the quantitative 1-d air/fuel ratio and temperature profiles measured by Raman scattering.


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    Title :

    Investigation of Mixture Formation in Diesel Sprays under Quiescent Conditions using Raman, Mie and LIF Diagnostics


    Additional title:

    Sae Technical Papers


    Contributors:
    Pauls, C. (author) / Grünefeld, G. (author) / Koss, H.-J. (author) / Hottenbach, P. (author) / Hoffmann, T. (author)

    Conference:

    SAE World Congress & Exhibition ; 2008



    Publication date :

    2008-04-14




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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