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Investigation of Aeroacoustic Noise Sources by Simultaneous PIV and Microphone Measurement

Henning, Arne und Käpernick, Kristian und Ehrenfried, Klaus und Koop, Lars und Dillmann, Andreas (2005) Investigation of Aeroacoustic Noise Sources by Simultaneous PIV and Microphone Measurement. 13th International Symposium Lisbon Applications of Laser Techniques to Fluid Mechanics, 2006-06-26 - 2006-06-29, Lisbon (Portugal).

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Kurzfassung

Aeroacoustic noise is been generated by the flow around moving vehicles. Such noise sources are located for example near the rear mirror of a car or near by the high lift system of an approaching aircraft. Its reduction is therefore one important goal of the transport industry to accommodate for the growing demand for mobility. To develop noise reduction strategies it is necessary to detect noise sources and to understand noise generation mechanisms. The objective of the present study is the detection and understanding of noise generation mechanisms by cross correlation techniques. The basic idea behind this concept is to simultaneously measure the flow field and the radiated sound. This gives information which flow structures correspond with the recorded sound. A simple test case is chosen to verify this approach. Hence, the flow field around a circular cylinder is been investigated by Particle Image Velocimitry (PIV) while the radiated sound is recorded with a single microphone. Both measurements are conducted in a synchronized manner to enable the calculation of the cross correlation between flow field data and acoustic data. The developed methods are then applied to a more relevant problem. Therefore measurements on a high lift system of a generic aircraft half model are conducted. In particular the flow field inside a leading edge slat cove is investigated by PIV and the radiated sound is recorded by a single microphone.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Investigation of Aeroacoustic Noise Sources by Simultaneous PIV and Microphone Measurement
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Henning, ArneTU-Berlin
Käpernick, KristianTU-Berlin
Ehrenfried, KlausNICHT SPEZIFIZIERT
Koop, LarsNICHT SPEZIFIZIERT
Dillmann, AndreasNICHT SPEZIFIZIERT
Datum:2005
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-12
Name der Reihe:CD-Rom Proceedings
Status:veröffentlicht
Stichwörter:PIV, POD, Correlation
Veranstaltungstitel:13th International Symposium Lisbon Applications of Laser Techniques to Fluid Mechanics
Veranstaltungsort:Lisbon (Portugal)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-06-26 - 2006-06-29
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Luftverkehr und Wetter (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Hubschrauber
Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren
Hinterlegt von: Ilka Micknaus
Hinterlegt am:30 Okt 2006
Letzte Änderung:14 Jan 2010 20:29

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