The predictive capability of a phenomenological spray-combustion model was evaluated for diesel engine performance, combustion, and emissions. The data used for comparisons with the predictions resulted from tests on two single-cylinder research-type open-chamber diesel engines -- a 2.0-L per cylinder heavy-duty engine and a 0.52-L per cylinder light-duty engine. The data covered wide ranges of speed and overall air-fuel ratio.Such global performance quantities as indicated mean effective pressure and indicated thermal efficiency predicted by the model agreed with experimental results from both engines within 5%. Pressure-time and heat-release rate predictions agreed within 5-15%. However, further improvements are needed before the model can be used reliably for emissions predictions. Specifically, predictions of nitric oxide (NO) and non-volatile particulate (soot) were in poor agreement with the measurements, especially for the light-duty engine. Inadequate modeling of the spray-wall impingement could be the reason for the observed disagreement.


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    Titel :

    Evaluation of a Phenomenological Spray-Combustion Model for Two Open-Chamber Diesel Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Kuo, Tang-Wei (Autor:in)

    Kongress:

    1987 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1987



    Erscheinungsdatum :

    01.11.1987




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Kuo,T.W. / General Motors Research Lab.,Engine Research Dep.,US | Kraftfahrwesen | 1987


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    Dicksee, C.B. | Engineering Index Backfile | 1949



    More Efficient Combustion in Small Open Chamber Diesel Engines

    Rogowski, A. R. / Rife, J. M. / Vanderpoel, R. E. | SAE | 1972