A numerical study has been performed to investigate the soot emission from a high-speed single-cylinder direct injection diesel engine. It was shown that the current KIVA CFD code with the standard evaporation model could predict the experimental trend, where at a low speed running condition a higher smoke reading is reached when increasing the injector protrusion into the piston chamber and conversely a lower smoke reading was recorded for the same change in injector protrusion at a high running speed condition. Evidence of inappropriate air/fuel mixing was seen via rates of heat release analyses, especially in the high-speed conditions. Efforts to reduce this discrepancy by way of improvements to the KIVA breakup and evaporation models were made. Results of the modified models showed improvements in the vapor dispersion of the atomizing liquid jet, thus affecting the mixing rates and predicted smoke emissions.


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    Title :

    Improvements of the KIVA Dense Spray Modeling for HSDI Diesel Engines


    Additional title:

    Sae Technical Papers


    Contributors:
    Greeves, G. (author) / Zhao, Hua (author) / Sterno, N. (author) / Tullis, S. (author) / Jiang, X. (author)

    Conference:

    2007 Fuels and Emissions Conference ; 2007



    Publication date :

    2007-01-23




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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