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- W2000905093 abstract "A reaction-drive rotor configuration including an ejector nozzle is studied to determine possible exhaust-jet velocity reduction for the purpose of noise suppression. A vortex-wake rotor model is compared with an experimental rotor test, determining the model validity for a hovering rotor. A two-dimensional computational fluid dynamic model of an ejector flow is compared with an experimental ejector-nozzle test to determine the appropriate grid coarseness and turbulence model relevant to lift and drag predictions supporting the hovering-rotor aerodynamic model. The reaction-drive-rotor tip-jet-ejector nozzle geometry is sized by the analysis method put forward here, implementing coupled rotor aerodynamic, reaction-drive tip-jet-ejector thermodynamic, and computational fluid dynamic models. A performance version of the proposed analysis method is developed to characterize this rotor configuration over a range of blade collective pitch angles operating in a hovering-flight condition." @default.
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- W2000905093 date "2009-05-01" @default.
- W2000905093 modified "2023-09-27" @default.
- W2000905093 title "Sizing and Performance-Prediction Method for Rotary-Wing Ejector Nozzles" @default.
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- W2000905093 doi "https://doi.org/10.2514/1.39423" @default.
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