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Application of Particle Image Velocimetry in Acoustic and Aeroacoustic Experiments

Henning, Arne (2016) Application of Particle Image Velocimetry in Acoustic and Aeroacoustic Experiments. INTERNOISE 2016, 21. - 24. Aug. 2016, Hamburg, Deutschland.

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Official URL: https://eventmobi.com/in16/speakers/169811/3898099

Abstract

Different applications of the Particle Image Velocimetry (PIV) in the field of acoustics and aeroacoustics are presented. This includes the investigation of cavity resonance and the calibration of a p-u probe, which is used for acoustic intensity measurements. For the later case velocity fluctuations down to the range of micrometers are resolved with a frequency resolution of 20 kHz. Additionally, applications of the causality correlation technique by means of simultaneous PIV and microphone measurements will be shown. The method is used for the identification of flow structures that are involved in the generation mechanism of aeroacoustic noise sources. Correlation results for the aeroacoustic investigation of a high lift device will be shown in detail, illustrating how the coherence in the flow topology influences such correlation results. The ambiguity of the proposed method will be discussed, focusing on the analyses of the temporal and spatial evolution of the coefficient matrix along trajectories of vortices emanating from the slat cusp. By taking into account the travel time of these vortices together with the sound travel time, sound generating flow structures can be clearly identified

Item URL in elib:https://elib.dlr.de/104019/
Document Type:Conference or Workshop Item (Speech)
Additional Information:http://www.internoise2016.org/
Title:Application of Particle Image Velocimetry in Acoustic and Aeroacoustic Experiments
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Henning, Arnearne.henning (at) dlr.deUNSPECIFIED
Date:2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 587-595
Status:Published
Keywords:PIV, Acoustic, Aeroacoustic, Correlation
Event Title:INTERNOISE 2016
Event Location:Hamburg, Deutschland
Event Type:international Conference
Event Dates:21. - 24. Aug. 2016
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: Bachmann, Barbara
Deposited On:04 Nov 2016 13:57
Last Modified:04 Nov 2016 13:57

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