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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. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.J050314 ISSN 0001-1452

Full text not available from this repository.

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

Abstract

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.

Item URL in elib:https://elib.dlr.de/65460/
Document Type:Article
Additional Information:AIAA-51669-130
Title:Simultaneous Multiplane PIV and Microphone Array Measurements on a Rod-Airfoil Configuration
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Henning, ArneTU-BerlinUNSPECIFIED
Koop, LarsUNSPECIFIEDUNSPECIFIED
Ehrenfried, KlausUNSPECIFIEDUNSPECIFIED
Date:2010
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:Vol. 48
DOI :10.2514/1.J050314
Page Range:pp. 2263-2273
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0001-1452
Status:Published
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 (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:08 Oct 2010 09:04
Last Modified:08 Mar 2018 18:41

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