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Simultaneous Multiplane PIV and Microphone Array Measurements on a Rod-Airfoil Configuration

Henning, Arne and Koop, Lars and Ehrenfried, Klaus (2010) Simultaneous Multiplane PIV and Microphone Array Measurements on a Rod-Airfoil Configuration. AIAA Journal, Vol. 48 (10), pp. 2263-2273. The American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.J050314. ISSN 0001-1452.

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Official URL: http://www.aiaa.org/content.cfm?pageid=322&lupubid=2


The aeroacoustic sound generation process on a rod-airfoil configuration has been investigated by means of simultaneous particle image velocimetry in the near field and phased-microphone-array measurements in the far field. Up to 20,000 particle image velocimetry snapshots per field of view have been recorded. A coplanar multiplane particle image velocimetry system has been used, providing statistically independent samples of the temporal derivative of the velocity field. Both measurements were conducted in a synchronized manner so as to enable the calculation of the cross-correlation between the acoustic pressure and flow quantities derived from the measured velocity fluctuations. The main idea of the concept used in the study presented here was to use the coefficient matrix obtained from the aforementioned correlation to identify regularities in the near-field fluctuations that are related to the radiated sound field. Additionally, a technique to localize flow structures responsible for the far-field sound by means of the calculation of the near-field intensity has been tested.

Document Type:Article
Additional Information:AIAA-51669-130
Title:Simultaneous Multiplane PIV and Microphone Array Measurements on a Rod-Airfoil Configuration
AuthorsInstitution or Email of Authors
Henning, ArneTU-Berlin
Ehrenfried, KlausUNSPECIFIED
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 48
Page Range:pp. 2263-2273
Publisher:The American Institute of Aeronautics and Astronautics (AIAA)
Keywords:causality correlation, PIV, microphone array measurements, aeroacoustic wind tunnel, airframe noise, rod-airfoil
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:08 Oct 2010 09:04
Last Modified:07 Feb 2013 20:29

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