Fluctuating forces and rotor noise due to main rotor-tail rotor interaction
Abstract
The paper is concerned with the helicopter noise which is generated by the interaction of the tip vortices of the main rotor with the tail rotor. This interaction was simulated by a test facility with two rotors. Sound pressure levels and noise spectra have been measured under various conditions. The unsteady forces on the tail rotor blades as well as the radiated sound field were calculated. Measured and calculated data show a reasonable agreement.
- Publication:
-
Association Aeronautique et Astronautique de France
- Pub Date:
- August 1982
- Bibcode:
- 1982aaaf.meet.....S
- Keywords:
-
- Aircraft Noise;
- Noise Generators;
- Rotary Wings;
- Rotor Aerodynamics;
- Wing Tip Vortices;
- Frequency Response;
- Helicopter Tail Rotors;
- Noise Spectra;
- Sound Fields;
- Sound Pressure;
- Acoustics