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- W278600933 abstract "Abstract : Far field sound pressure levels were measured in an anechoic room for noise generated by cold air flow through a wide variety of small nozzle configurations. These nozzles included converging, converging-diverging, annular plug, annular center core flow, and ejector types. The results are examined in terms of mass flow and acoustic power performance. Thrust determinations were made for selected nozzles showing good acoustic performance, permitting an ultimate evaluation of their acoustic performance in terms of their thrust performance. Optimized nozzles from each of four nozzle configurations are recommended for a full-scale evaluation. These are a plug, a center core flow, a converging-diverging, and a converging-diverging plug nozzle. The noise generated by hot air flow through a converging nozzle was determined, enabling only partial corroboration of the scaling technique developed in a previous study. One of the recommended nozzle types, the plug nozzle, was investigated under hot flow conditions and its acoustic performance was found to remain superior to that of a converging nozzle." @default.
- W278600933 created "2016-06-24" @default.
- W278600933 creator A5030178115 @default.
- W278600933 date "1964-12-01" @default.
- W278600933 modified "2023-09-25" @default.
- W278600933 title "EXPERIMENTAL NOISE INVESTIGATION OF MODEL NOZZLES" @default.
- W278600933 doi "https://doi.org/10.21236/ad0610256" @default.
- W278600933 hasPublicationYear "1964" @default.
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