Acoustic measurements from a rotor blade-vortex interaction noise experiment in the German-Dutch Wind Tunnel (DNW)
Abstract
Acoustic data are presented from a 40 percent scale model of the 4-bladed BO-105 helicopter main rotor, measured in the large European aeroacoustic wind tunnel, the DNW. Rotor blade-vortex interaction (BVI) noise data in the low speed flight range were acquired using a traversing in-flow microphone array. The experimental apparatus, testing procedures, calibration results, and experimental objectives are fully described. A large representative set of averaged acoustic signals is presented.
- Publication:
-
Unknown
- Pub Date:
- March 1988
- Bibcode:
- 1988amrb.book.....M
- Keywords:
-
- Acoustic Measurement;
- Blade-Vortex Interaction;
- Helicopters;
- Rotors;
- Wind Tunnel Models;
- Wind Tunnel Tests;
- Aeroacoustics;
- Arrays;
- Calibrating;
- Low Speed;
- Microphones;
- Acoustics