OH PLIF imaging of supersonic combustion using cavity injection

Sean O'Byrne*, Ingo Stotz, Andrew J. Neely, Russell R. Boyce, Neil R. Mudford, A. F.P. Houwing

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    59 Citations (Scopus)

    Abstract

    Planar laser-induced fluorescence of the hydroxyl radical is used to investigate a cavity-based fuel injection system for scramjet operation at a flight Mach number of 11.5. Hydrogen and ethylene fuels are compared over a range of fuel-lean global equivalence ratios. Both fuels show evidence of combustion at each fuel injection pressure. Hydrogen burns diffusively in the shear layer and further downstream, with penetration distance increasing linearly with injection pressure. The combustion in the cavity shear layer sheds regular vortices. Ethylene behaves similarly to hydrogen at the lower equivalence ratios but shows evidence of intense, localized combustion at the highest equivalence ratio. In all cases combustion occurs in the shear layer above the cavity rather than in the recirculating cavity flow.

    Original languageEnglish
    Title of host publicationA Collection of Technical Papers - 13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference
    PublisherAmerican Institute of Aeronautics and Astronautics Inc.
    Pages1466-1477
    Number of pages12
    ISBN (Print)1563477297, 9781563477294
    DOIs
    Publication statusPublished - 2005
    Event13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference - Capua, Italy
    Duration: 16 May 200520 May 2005

    Publication series

    NameA Collection of Technical Papers - 13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference
    Volume3

    Conference

    Conference13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference
    Country/TerritoryItaly
    CityCapua
    Period16/05/0520/05/05

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