In this paper, formulation of a mathematical model for flame propagation in a spark ignited reciprocating engine has been described. As against the common practice of assuming a laminar flame propagation model with a suitable multiplying factor for turbulence effects, a more logical approach has been adopted bringing in the concept of an engine Reynolds parameter as the criterion to determine the combustion acceleration due to turbulence. The laminar burning velocity is calculated from Semenov's thermal model for the instantaneous unburned gas condition during combustion and is augmented for engine gas turbulence through an empirical function of the engine Reynolds parameter assuming wrinkled flame model. The turbulent flame velocity thus obtained is then corrected for flame transportation due to the expansion of the burning gases. The empirical constants in the formula have been evaluated in correlation to results of extensive experimentation on a single cylinder variable compression ratio research engine.In this paper, formulation of a mathematical model for flame propagation in a spark ignited reciprocating engine has been described. As against the common practice of assuming a laminar flame propagation model with a suitable multiplying factor for turbulence effects, a more logical approach has been adopted bringing in the concept of an engine Reynolds parameter as the criterion to determine the combustion acceleration due to turbulence. The laminar burning velocity is calculated from Semenov's thermal model for the instantaneous unburned gas condition during combustion and is augmented for engine gas turbulence through an empirical function of the engine Reynolds parameter assuming wrinkled flame model. The turbulent flame velocity thus obtained is then corrected for flame transportation due to the expansion of the burning gases. The empirical constants in the formula have been evaluated in correlation to results of extensive experimentation on a single cylinder variable compression ratio research engine.


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    Titel :

    On the Problem of Predicting Burning Rates in a Spark Ignition Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Murthy, B. S. (Autor:in) / Samaga, B. S. (Autor:in)

    Kongress:

    National Fuels and Lubricants and Transportation Meetings ; 1975



    Erscheinungsdatum :

    1975-02-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    On the problem of predicting burning rates in a spark ignition engine

    Samaga,B.S. / Murthy,B.S. / Karnataka Regional Engineering College et al. | Kraftfahrwesen | 1975


    On the problem of predicting burning rates in a spark ignition engine.

    Samaga,B.S. / Muertha,B.S. / Karnataka Regional Engng. Coll.(India) Indian Inst. Technology. | Kraftfahrwesen | 1975


    Low-Compression Spark-Ignition Oil-Burning-Engine Analysis

    Dutcher, Frederick H. | SAE Technical Papers | 1934


    Mass burning rates in a spark ignition engine operating in the partial-burn regime

    Peters,B.D. / General Motors Res.Lab.,US | Kraftfahrwesen | 1979


    Spark Ignition Engine Progress

    Lucas, Albert G. | SAE Technical Papers | 1967