Synchrotron x-radiography and a novel fast x-ray detector are used to visualize the detailed, time-resolved structure of the fluid jets generated by a high pressure diesel-fuel injection. An understanding of the structure of the high-pressure spray is important in optimizing the injection process to increase fuel efficiency and reduce pollutants. It is shown that x-radiography can provide a quantitative measure of the mass distribution of the fuel. Such analysis has been impossible with optical imaging due to the multiple-scattering of visible light by small atomized fuel droplets surrounding the jet. In addition, direct visualization of the jet-induced shock wave proves that the fuel jets become supersonic under appropriate injection conditions. The radiographic images also allow quantitative analysis of the thermodynamic properties of the shock wave.


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    Title :

    Shock Waves Generated by High-Pressure Fuel Sprays Directly Imaged by X-Radiography


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Future Car Congress ; 2002



    Publication date :

    2002-06-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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