AbstractThe understanding and the prediction of the phenomena involved in turbulent combustion appear as complicated problems if quantitative calculations in practical cases are required.A new calculation method for premixed turbulent flames is proposed here, based on the expected shape of the probability density function of the temperature or concentration fluctuations. The model, assuming a single-step global reaction, is restricted to non stoechimetric mixture, but involves a strong dependance (with any activation energy) of the reaction rate with temperature, and can be applied to extreme cases of turbulence controlled or chemically controlled combustion, as well as to intermediate cases.The application of this method in the case of recent experiments with a premixed CH4-air flame initiated by a pilot jet is shown to be satisfactory; in particular, a characteristic thickening of the flame zone, due to the presence of separate pockets of hot but burnt or unburnt but low temperature gases in the flow, is put into evidence. However, a more complete turbulence model, involving a turbulence scale length equation, is expected to lead to a finer agreement.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Turbulent combustion in a premixed flow


    Beteiligte:
    Borghi, R. (Autor:in) / Moreau, P. (Autor:in)

    Erschienen in:

    Acta Astronautica ; 4 , 3-4 ; 321-341


    Erscheinungsdatum :

    1976-10-07


    Format / Umfang :

    21 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Partially premixed diffusion flamelets in non-premixed turbulent combustion

    Peters,N. / Tech.Hochsch.Aachen,Inst.fuer Allgemeine Mechanik | Kraftfahrwesen | 1984


    Premixed turbulent combustion in model combustors

    Anacleto, P. M. / Heitor, M. V. / Moreira, A. L. N. et al. | British Library Conference Proceedings | 1994


    Evaluation of Turbulent Combustion Models for Canonical Premixed/Non-Premixed Combustors

    Miki, Kenji / Moder, Jeffrey P. / Wey, Thomas et al. | AIAA | 2018


    Numerical Simulation of Supersonic Premixed Turbulent Combustion

    Nielsen, Tanner / Edwards, Jack R. | AIAA | 2017


    Turbulence effects on accelerating turbulent premixed combustion

    Liao,S.Y. / Jiang,D.M. / Gao,J. et al. | Kraftfahrwesen | 2004