[
    {
        "id": "authors:q1gmz-brp53",
        "collection": "authors",
        "collection_id": "q1gmz-brp53",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20110114-111632665",
        "type": "article",
        "title": "A mechanism for high-frequency oscillation in ramjet combustors and afterburners",
        "author": [
            {
                "family_name": "Rogers",
                "given_name": "Don E.",
                "clpid": "Rogers-D-E"
            },
            {
                "family_name": "Marble",
                "given_name": "Frank E.",
                "clpid": "Marble-F-E"
            }
        ],
        "abstract": "An experimental investigation was made of the behavior\nof a small two-dimensional combustion chamber, burning\na uniform mixture of air and fuel vapor under conditions\nof high-frequency oscillation or screech. Measurements\nwere made of the limits of stable screech, the amplitude\nand frequency of pressure oscillations over a wide range of\nmixture ratio, inlet air temperature, and combustor flow\nrate. Spark schlieren photographs and high-speed motion pictures taken of the combustion process showed, in\nagreement with other investigations, that the high-frequency\noscillation is accompanied by vortices shed periodically from the flameholder lip with the same frequency as the oscillation. The following mechanism of exciting the oscillations is suggested. A mode of transverse\noscillation is excited as the result of periodic transport\nof combustible material, associated with the vortices,\ninto the hot wake of the flameholder. The vortices, in\nturn, are generated at the flameholder lips by the fluctuating transverse velocity. When the ignition time delay lies in the proper range, the phase relationship between oscillations in transverse velocity and combustion intensity is such that the oscillation is amplified.",
        "issn": "0095-8751",
        "publisher": "American Rocket Society",
        "publication": "Jet Propulsion",
        "publication_date": "1956-06",
        "series_number": "6",
        "volume": "26",
        "issue": "6",
        "pages": "456-462"
    }
]