NASA STI Repository (National Aeronautics and Space Administration) · 1983 · 11 citations · 3 references
Open access
EngineeringAerospace EngineeringMechanical EngineeringAerodynamicsAircraft DesignWind EngineeringAerodynamic TestingExperimental AerodynamicsExternal AerodynamicsRotorcraft AerodynamicsRotordynamicsWind-tunnel TestingBlade AerodynamicsInteraction EffectsRotor Aerodynamic InteractionsRotor AerodynamicsRotor Blade AerodynamicsRotor Hub AerodynamicsRotor InteractionsRotor Performance Analysis
A wind tunnel investigation was conducted in which independent, steady state aerodynamic forces and moments were measured on a 2.24 m diam. two bladed helicopter rotor and on several different bodies. The mutual interaction effects for variations in velocity, thrust, tip-path-plane angle of attack, body angle of attack, rotor/body position, and body geometry were determined. The results show that the body longitudinal aerodynamic characteristics are significantly affected by the presence of a rotor and hub, and that the hub interference may be a major part of such interaction. The effects of the body on the rotor performance are presented.
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