Application of a Beamforming Technique to the Measurement of Airfoil Leading Edge Noise
Joint Authors
Giesler, Jens
Geyer, Thomas
Sarradj, Ennes
Source
Advances in Acoustics and Vibration
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-02-13
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
The present paper describes the use of microphone array technology and beamforming algorithms for the measurement and analysis of noise generated by the interaction of a turbulent flow with the leading edge of an airfoil.
Experiments were performed using a setup in an aeroacoustic wind tunnel, where the turbulent inflow is provided by different grids.
In order to exactly localize the aeroacoustic noise sources and, moreover, to separate airfoil leading edge noise from grid-generated noise, the selected deconvolution beamforming algorithm is extended to be used on a fully three-dimensional source region.
The result of this extended beamforming are three-dimensional mappings of noise source locations.
Besides acoustic measurements, the investigation of airfoil leading edge noise requires the measurement of parameters describing the incident turbulence, such as the intensity and a characteristic length scale or time scale.
The method used for the determination of these parameters in the present study is explained in detail.
To demonstrate the applicability of the extended beamforming algorithm and the experimental setup as a whole, the noise generated at the leading edge of airfoils made of porous materials was measured and compared to that generated at the leading edge of a common nonporous airfoil.
American Psychological Association (APA)
Geyer, Thomas& Sarradj, Ennes& Giesler, Jens. 2012. Application of a Beamforming Technique to the Measurement of Airfoil Leading Edge Noise. Advances in Acoustics and Vibration،Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-506921
Modern Language Association (MLA)
Geyer, Thomas…[et al.]. Application of a Beamforming Technique to the Measurement of Airfoil Leading Edge Noise. Advances in Acoustics and Vibration No. 2012 (2012), pp.1-16.
https://search.emarefa.net/detail/BIM-506921
American Medical Association (AMA)
Geyer, Thomas& Sarradj, Ennes& Giesler, Jens. Application of a Beamforming Technique to the Measurement of Airfoil Leading Edge Noise. Advances in Acoustics and Vibration. 2012. Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-506921
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-506921