Several alternative fuels (e.g. hydrogen, bio-fuels ...) are currently studied in order to decrease the dependence of automotive industry on fossil fuels. Most of these studies aims at adapting internal combustion engines to alternative fuels instead of developing new ones. This work is related to these studies and is devoted to the adaptation of the ECFM model (Extended Coherent Flame Model) to the combustion of hydrogen. This model, developed to simulate premixed combustion for both homogeneous and stratified mixtures, defines the reaction rate as the product of the laminar flame speed and the flame surface density (i.e. flame surface per unit volume). On the one hand, a correlation for the laminar flame speed of hydrogen over a wide range of operating conditions is derived and validated against experimental data and detailed chemistry computations. This correlation accounts for the effect of the main parameters on the laminar flame speed: Fuel/air equivalence ratio, temperature, pressure and residual gas fraction. On the other hand, the transport equation of the flame surface density is adapted to the combustion of hydrogen by introducing the laminar propagation term in the equation (usually neglected in engine applications because it is small compared to turbulent contributions). Finally, the adapted ECFM model is applied to a first cryogenic engine application to evaluate the feasibility of hydrogen-fuelled engine computations with this model.


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    Title :

    Adaptation of the ECFM combustion model to hydrogen internal combustion engines


    Additional title:

    Anpassung des erweiterten, kohärenten Flammverbrennungsmodelles an Wasserstoff-Verbrennungsmotoren


    Contributors:
    Knop, V. (author) / Benkenida, A. (author) / Jay, S. (author)


    Publication date :

    2006


    Size :

    12 Seiten, 5 Bilder, 2 Tabellen, 36 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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