The present experimental study examines the effects of differing levels of passive fuel-air premixing on flame structures and their associated NO(x) and CO emissions. Four alternative fuel injector geometries were explored, three of which have lobed shapes. These lobed injectors mix fuel and air and strain species inter-faces to differing extents due to streamwise vorticity generation, thus creating different local or core equivalence ratios within flow regions upstream of flame ignition and stabilization. Prior experimental studies of two of these lobed injector flowfields focused on non-reactive mixing characteristics and emissions measurements for the case where air speeds were matched above and below the fuel injector, effectively generating stronger streamwise vorticity than spanwise vorticity. The present studies examine the effects of airstream mismatch (and hence additional spanwise vorticity generation), effects of confinement of the crossflow to reduce the local equivalence ratio, and the effects of altering the geometry and position of the flameholders. NO(x) and CO emissions as well as planar laser-induced fluorescence imaging (PLIF) of seeded acetone are used to characterize injector performance and reactive flow evolution.


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    Titel :

    Effects of Passive Fuel-Air Mixing Control on Burner Emissions Via Lobed Fuel Injectors


    Beteiligte:
    Mitchell, M. G. (Autor:in) / Smith, O. I. (Autor:in) / Karagozian, A. R. (Autor:in)

    Kongress:

    Joint Propulsion ; 1999 ; Los Angeles, CA, United States


    Erscheinungsdatum :

    01.01.1999


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch





    Effects of Passive Fuel-Air Mixing Control on Burner Emissions Via Lobed Fuel Injectors

    Mitchell, M. G. / Smith, O. I. / Karagozian, A. R. et al. | British Library Conference Proceedings | 1999



    Passive FuelAir Mixing and Emissions Control Via Lobed Injectors

    M. Mitchell / O. Smith / A. Karagozian | AIAA | 2004


    Emissions measurements from a lobed fuel injector/burner

    Mitchell, M. / Smith, L. / Karagozian, A. et al. | AIAA | 1998