The interior noise of jet aircraft can compete with luxury cars. Propeller driven aircraft, however, generally suffer from an unpleasantly loud cabin noise. The aerodynamic and acoustic effects of non-axial inflow on wide-chord, advanced high speed propellers are studied by means of a lifting surface theory. Starting from the flow equations for a perturbed, axially subsonic flow, expressions are derived for the pressure and velocity field of a propeller. By using a Green's function representation in separated, cylindrical coordinates the boundary condition at the hub is naturally incorporated.
Effects of Asymmetric Inflow on Near-Field Propeller Noise
1997
15 pages
Report
Keine Angabe
Englisch
Fluid Mechanics , Acoustics , Aerodynamics , Noise Pollution & Control , Aeroacoustics , Propeller noise , Asymmetry , Downwash , Engine airframe integration , Fokker aircraft , Green's functions , Harmonic analysis , Inlet flow , Integral equations , Propeller blades , Sound fields , Foreign technology
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