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- W2064519077 abstract "Aeroacoustic tests are conducted on scale model mixer nozzle configurations, a separate flow nozzle, and a baseline conical nozzle in an anechoic chamber free-jet facility to investigate exhaust system designs. Far-field acoustic data and exhaust jet plume aerodynamic data are obtained for various combinations of exhaust jet velocity and simulated flight speed, with corrected microphone data at a constant 12.2 m arc distance, and scaled acoustic data at a sideline distance of 457 m. It is found that jet plume aerodynamic and acoustic characteristics of lobed mixer exhaust systems are similar to those of a conical nozzle operating at the same specific thrust, although differences occur at high frequencies, where the sound pressure level of the mixer nozzle is 1-5 dB higher than that of a conical nozzle. In addition, no direct correlation is found between exit plane turbulence levels and plume development or acoustic characteristics for mixer exhaust configurations." @default.
- W2064519077 created "2016-06-24" @default.
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- W2064519077 date "1981-08-17" @default.
- W2064519077 modified "2023-09-27" @default.
- W2064519077 title "Mixer nozzle aeroacoustic characteristics for the energy efficient engine" @default.
- W2064519077 doi "https://doi.org/10.2514/6.1981-1994" @default.
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