Henning, Arne and Koop, Lars and Ehrenfried, Klaus (2010) Causality Correlation in Aeroacoustic Experiments by Means of Simultaneous PIV and Microphone-Array Measurements. BeBeC Berlin Beamforming Conference, 2010-02-24 - 2010-02-25, Berlin, Germany. ISBN 978-3-00-030027-1.
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Official URL: http://www.bebec2010.com
Abstract
In this paper we present applications of the causality correlation technique by means of simultaneous PIV measurements in a turbulent flow and microphone-array measurements in the aeroacoustic far field of the flow. 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 presented here is 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. The method is used for the identification of flow structures that are involved in the generation mechanism of aeroacoustic noise sources. Results for measurements on a Rod-Airfoil configuration with a strong tonal component in the acoustic far-field as well as for a cold jet with a broadband spectrum are presented.
Item URL in elib: | https://elib.dlr.de/61885/ | ||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||||||||||||
Title: | Causality Correlation in Aeroacoustic Experiments by Means of Simultaneous PIV and Microphone-Array Measurements | ||||||||||||||||
Authors: |
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Date: | 2010 | ||||||||||||||||
Open Access: | No | ||||||||||||||||
Gold Open Access: | No | ||||||||||||||||
In SCOPUS: | No | ||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||
Page Range: | pp. 1-13 | ||||||||||||||||
Series Name: | Conference Proceedings | ||||||||||||||||
ISBN: | 978-3-00-030027-1 | ||||||||||||||||
Status: | Published | ||||||||||||||||
Keywords: | Microphone-Array Measurements, Aeroacoustic, PIV | ||||||||||||||||
Event Title: | BeBeC Berlin Beamforming Conference | ||||||||||||||||
Event Location: | Berlin, Germany | ||||||||||||||||
Event Type: | international Conference | ||||||||||||||||
Event Start Date: | 24 February 2010 | ||||||||||||||||
Event End Date: | 25 February 2010 | ||||||||||||||||
Organizer: | Gfal, DLR und TU-Berlin | ||||||||||||||||
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: | 02 Mar 2010 13:27 | ||||||||||||||||
Last Modified: | 24 Apr 2024 19:26 |
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