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Comparison of Microphone Array Measurements of an Airfoil with High-Lift Devices in Open and Closed Wind Tunnels

Kröber, Stefan and Koop, Lars (2011) Comparison of Microphone Array Measurements of an Airfoil with High-Lift Devices in Open and Closed Wind Tunnels. 17th AIAA/CEAS Aeroacoustics Conference , 06. - 08. Jun. 2011 , Portland, Oregon, USA.

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Official URL: http://www.aiaa.org

Abstract

A comparison between microphone array measurements in closed and open test sections of wind tunnels is presented using a generic 3-element high-lift system. The aeroacoustic measurements were simultaneously performed with aerodynamic measurements with the goal of examining the test section-dependent aeroacoustic and aerodynamic characteristics and their influences on aeroacoustic sound generation and propagation. The study focuses on the beamforming results in both wind tunnel types with respect to source position, relative and absolute levels of beamforming results and integrated spectra by considering the aerodynamic performance in terms of the lift coefficient and static pressure distribution along the model. In both wind tunnels the same phased microphone array is used for the measurements, whereby the aim is to keep the experimental setup and conditions as identical as possible in both cases in order to be able to examine the test section-dependent effects.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Comparison of Microphone Array Measurements of an Airfoil with High-Lift Devices in Open and Closed Wind Tunnels
Authors:
AuthorsInstitution or Email of Authors
Kröber, StefanUNSPECIFIED
Koop, LarsUNSPECIFIED
Date:2011
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Conference Proceedings online
Status:Published
Keywords:aeroacoustics, microphone array, beamforming, high-lift system
Event Title:17th AIAA/CEAS Aeroacoustics Conference
Event Location:Portland, Oregon, USA
Event Type:international Conference
Event Dates:06. - 08. Jun. 2011
Organizer:AIAA, CEAS
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 > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:21 Sep 2011 09:10
Last Modified:21 Sep 2011 09:10

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