A method named characteristic curve of flame volume is achieved for lean blowout predictions on the basis of the improved Lefebvre’s model and simulated reacting flows. Three main issues are presented: 1) Based on the results from combustion visualization experiments, Lefebvre’s model is improved regarding its universality for combustor configurations. The flame volume near lean blowout Vflame,LBO obtained from simulated reacting flow is introduced into the model. 2) Characteristic curve of flame volume is a functional curve of flame volume Vflame and fuel/air ratio q in a certain combustor and is presented as an “S” pattern, with q ranging from stable operation to nearly engine-off conditions. The region where the fuel/air ratio ranges from 3 to 10 in characteristic curve of flame volume is the unstable combustion region, and nearly all of the lean blowout points fall in this region. 3) According to the relationship between characteristic curve of flame volume expressed as q=f(Vflame) and the improved Lefebvre’s model expressed as qLBO=fm(Vflame,LBO), a method named characteristic curve of flame volume is proposed for lean blowout predictions. By the comparison with experimental data on 26 combustors, the lean blowout fuel/air ratios obtained by the characteristic curve of flame volume method fit well with that obtained by experiments, having maximum and average errors of ±24.2 and ±7.0% between predictions and measurements.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Predicting Lean Blowout Limit of Combustors Based on Semi-Empirical Correlation and Simulation



    Erschienen in:

    Erscheinungsdatum :

    2016




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    BKL:    55.50 Luftfahrzeugtechnik / 55.50
    Lokalklassifikation TIB:    770/7040





    Active Control of Lean Blowout for Turbine Engine Combustors

    T. Muruganandam / S. Nair / D. Scarborough et al. | AIAA | 2005


    Active Control of Lean Blowout for Turbine Engine Combustors

    Muruganandam, T.M. | Online Contents | 2005


    Origin of Lean Blowout Precursors in Swirled Gas Turbine Combustors

    Muruganandam, T. M. / Seitzman, J. M. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2005