Velocity and low frequency combustor pressure oscillations have been measured in a ramjet dump combustor model. The mean and RMS values of the turbulent velocity field were obtained using a two-component LDV system operating in the backscatter mode. Reacting flow data were obtained for a premixed propane/air, while isothermal results were collected replacing the propane with nitrogen. The velocity data indicated substantial differences between the two cases. Combustor pressure oscillation data were obtained utilizing high frequency dynamic pressure transducers. The intensity and frequency of the oscillations were measured as a function of inlet velocity, combustor length, and equivalence ratio. Results showed that pressure oscillations were controlled by both vortex kinetics in the cumbustor and acoustic response of the inlet section.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Premixed, turbulent combustion of axisymmetric sudden expansion flows


    Additional title:

    Turbulente Verbrennung in vorgemischten axialsymmetrischen Strömungen bei plötzlicher Expansion


    Contributors:
    Ahmed, S.A. (author) / Nejad, A.S. (author)


    Publication date :

    1991


    Size :

    8 Seiten, 11 Bilder, 2 Tabellen, 8 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Rotation effects on axisymmetric sudden-expansion flows

    SO, RONALD M. C. / AHMED, SAAD A. | AIAA | 1988


    Investigation of turbulent transport in an axisymmetric sudden expansion

    GOULD, RICHARD D. / STEVENSON, WARREN H. / THOMPSON, H. DOYLE | AIAA | 1990


    Investigation of turbulent transport in an axisymmetric sudden expansion

    Gould, Richard D. / Stevenson, Warren H. / Thompson, H. Doyle | NTRS | 1990


    Simulation of Turbulent Swirl Flow in an Axisymmetric Sudden Expansion

    Baoyu Guo / Tim A. G. Langrish / David F. Fletcher | AIAA | 2001