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- W2009947305 abstract "A study was made of helicopter tail rotor noise, particularly that due to interactions with the wakes of the main rotor, hub, and fuselage, and with the engine exhaust. Both harmonic and broadband noise were analyzed. The disturbed flow into the tail rotor was modeled using combinations of aerodynamic and acoustic flow codes along with some necessary estimates of turbulence properties. Representative calculations show that the main rotor wake is the strongest contributor to both harmonic and broadband tail rotor noise. The fuselage separation wake and the engine exhaust flow are also very important to both harmonic and broadband noise. The hub and hub-shaft wakes are important contributors to the broadband noise only. The tip vortices do not seem to be important to broadband noise, but their effects on harmonic noise were not modeled accurately enough to draw any conclusions from this study." @default.
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- W2009947305 date "1986-10-01" @default.
- W2009947305 modified "2023-10-18" @default.
- W2009947305 title "A Comparative Study of Tail Rotor Noise Mechanisms" @default.
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- W2009947305 doi "https://doi.org/10.4050/jahs.31.36" @default.
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