Effect of standing transverse acoustic oscillations on fuel-oxidant mixing in cylindrical combustion chambers

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Summary:: Vapor fuel-oxidant mixing is analyzed for standing transverse acoustic fields simulating those existing in screeching or screaming combustors. The additional mixing due to the acoustic field is shown to be a function of sound pressure and frequency, stream velocity, and turbulence. The effects of these parameters are shown graphically for a realistic range of combustor conditions. The fuel-oxidant ratio at various combustor stations is shown to have a cyclic fluctuation which is in phase with the pressure fluctuations. Possible mechanisms contributing to screech and scream are discussed.
Collection:: NASA Technical Reports Server (NTRS) Collection.
Note:: Document ID: 19930084745.
Accession ID: 93R14035.
NACA-TN-3983.
Terms of Use and Reproduction:: No Copyright.

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