| Auteur | Rechercher : Syms, G.F.1; Rechercher : Mamou, M.1 |
|---|
| Affiliation | - Conseil national de recherches du Canada. Aérospatiale
|
|---|
| Format | Texte, Article |
|---|
| Conférence | 19th AIAA/CEAS Aeroacoustics Conference, 27 May 2013 through 29 May 2013, Berlin |
|---|
| Sujet | Aerodynamic wind tunnel model; Aircraft manufacturers; Bombardier aerospaces; Calibration procedure; Collaborative research; Conventional beamforming; National Research Council; Post-processing procedure; Aeroacoustics; Aerodynamics; Aircraft models; Calibration; Microphones; Acoustic noise |
|---|
| Résumé | Aerodynamic testing of high fidelity models is a standard practice for aircraft manufacturers. With the development of phased microphone array technology, aeroacoustics can become an integral part of the design process of an airplane. In 2012, the National Research Council Canada and Bombardier Aerospace carried out a collaborative research program focusing on measuring the sound generated by a high-fidelity aerodynamic wind tunnel model. The noise of various configurations was measured at combinations of three wind speeds and three microphone array polar orientations above the model. Several calibration reference noise waveforms were explored to determine the most effective in a highly reverberant hard-walled test section. The calibration data analysis showed that meaningful beamform maps above 30kHz could be generated when a pulsed sine wave was applied as the reference noise signal in the calibration process. For the model configurations tested, slat noise dominated the sound maps processed using either conventional beamforming or CLEAN-PSF. The wing flap edge noise as well as the contributions from the main gear were also discernible. For each configuration, one data point was taken while the microphone array was rotating instead of stationary. The computationally intense post-processing procedure for these data provided a detailed map of the sources due to reduced spatial aliasing. The sound levels measured with the rotating array were at a slightly lower magnitude owing to the averaging of the source over its full directivity pattern. Future work includes implementing a calibration procedure for the rotating array and improving the signal-to-noise ratio of the signals so that shorter microphone time histories can be used to extract directivity information from the datasets of the rotating array. |
|---|
| Date de publication | 2013 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro NPARC | 21269855 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 73e9c373-6af2-442f-9fa6-34af9a3ef0a2 |
|---|
| Enregistrement créé | 2013-12-13 |
|---|
| Enregistrement modifié | 2020-04-22 |
|---|
