Spatially resolved laser absorption measurements of CO, CO 2 , and H 2 O within an ethylene-fueled direct-connect model scramjet combustor are presented. The sensors employ a variety of laser sources at midinfrared wavelengths to provide access to fundamental vibrational band absorption transitions for each species. Both scanned-wavelength-modulation spectroscopy and scanned-wavelength direct-absorption are used, with particular attention paid to employing these methods in a manner that accounts for expected nonuniformities in temperature and composition throughout the combustor. Results for product temperatures and column densities offer insight on the ongoing combustion process downstream of fuel injection throughout the combustion-product plume, and on the significant temporal variations in the combustor. Additional tests measure the temperature and concentration of H 2 O in the cavity flameholder during a flame extinction event, which gives an upper bound of the cavity residence time. These measurements are the first use of these midinfrared wavelengths for measurements in a scramjet combustor, and this work introduces an important new tool for characterizing hydrocarbon combustion in scramjet engines.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Multispecies Midinfrared Absorption Measurements in a Hydrocarbon-Fueled Scramjet Combustor



    Published in:

    Publication date :

    2014-09-19


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Hydrocarbon-fueled scramjet combustor investigation

    KAY, I. W. / PESCHKE, W. T. / GUILE, R. N. | AIAA | 1992


    Hydrocarbon-fueled scramjet combustor investigation

    KAY, I. / PESCHKE, W. / GUILE, R. | AIAA | 1990


    Hydrocarbon-fueled scramjet combustor investigation

    Kay, I. W. / Peschke, W. T. / Guile, R. N. | NTRS | 1992


    Experimental Characterization of Hydrocarbon-Fueled, Axisymmetric, Scramjet Combustor Flowpaths

    Gruber, M. / Smith, S. / Mathur, T. et al. | British Library Conference Proceedings | 2011