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Intensity-Analysis of Cross-Correlated Synchronized PIV and Microphone Measurements

Siegel, Lars and Ehrenfried, Klaus and Henning, Arne and Wagner, Claus (2015) Intensity-Analysis of Cross-Correlated Synchronized PIV and Microphone Measurements. 11th International Symposium on Particle Image Velocimetry – PIV 15, 2015-09-14 - 2015-09-16, Santa Barbara, California, USA.

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Official URL: http://www.piv2015.org/


An approach towards the identification of flow structures related to the aeroacoustic source mechanism in turbulent flows is presented. The new methodology is based on an analysis of the generalized intensity which is obtained considering an acoustic analogy and the existence of an energy conservation principle. The intensity distribution in the flow-field is derived from the correlation matrix, resulting from velocity fluctuations in the flow field captured via particle image velocimetry (PIV) and from the pressure field in the acoustic far-field. The approach is applied to two flow cases, namely a cylinder wake and the slat flow of a high lift configuration. Regions of effective production of fluctuation energy are identified, allowing conclusions about noise sources in the turbulent flow region.

Item URL in elib:https://elib.dlr.de/98315/
Document Type:Conference or Workshop Item (Speech)
Title:Intensity-Analysis of Cross-Correlated Synchronized PIV and Microphone Measurements
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Siegel, LarsUNSPECIFIEDhttps://orcid.org/0000-0002-5601-3826UNSPECIFIED
Wagner, ClausUNSPECIFIEDhttps://orcid.org/0000-0003-2273-0568UNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-10
Series Name:Conference Proceedings on USB-Stick
Keywords:PIV, aeroacoustic, acoustic analogy, noise sources, flow structures, generalized intensity, fluctuation energy, cylinder wake, slat flow
Event Title:11th International Symposium on Particle Image Velocimetry – PIV 15
Event Location:Santa Barbara, California, USA
Event Type:international Conference
Event Start Date:14 September 2015
Event End Date:16 September 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Micknaus, Ilka
Deposited On:09 Oct 2015 10:06
Last Modified:24 Apr 2024 20:03

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