Henning, Arne und Krebs, Ingo und Schröder, Andreas (2011) Simultaneous Density Gradient and Far-Field Pressure Measurements on a Cold Jet. 9th International Symposium on Particle Image Velocimetry – PIV’11, 2011-07-21 - 2011-07-23, Kobe, Japan.
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Offizielle URL: http://piv11.org/
Kurzfassung
The aeroacoustic sound generation process on a cold jet at a Mach-number M = 0.9 has been investigated by means of simultaneous Background Oriented Schlieren (BOS) measurements in the near-field and microphone measurements in the far-field. 20 000 BOS snapshots in the field of view have been recorded. Both measurements were conducted in a synchronized manner so as to enable the calculation of the cross-correlation between the acoustic pressure and the measured density gradients. The main idea of the concept presented here was 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. A second approach is presented, correlating the deformed image patterns resulting from the BOS measurement directly with the far-field pressure signal. By this the averaged pixel-shift weighted with the pressure signal is obtained.
elib-URL des Eintrags: | https://elib.dlr.de/69843/ | ||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag, Paper) | ||||||||||||||||
Titel: | Simultaneous Density Gradient and Far-Field Pressure Measurements on a Cold Jet | ||||||||||||||||
Autoren: |
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Datum: | 2011 | ||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||
Open Access: | Nein | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||
Name der Reihe: | Conference Proceedings on USB-Stick | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | Background Oriented Schlieren (BOS), cross-correlation, Far-Field Pressure, Cold Jet | ||||||||||||||||
Veranstaltungstitel: | 9th International Symposium on Particle Image Velocimetry – PIV’11 | ||||||||||||||||
Veranstaltungsort: | Kobe, Japan | ||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||
Veranstaltungsbeginn: | 21 Juli 2011 | ||||||||||||||||
Veranstaltungsende: | 23 Juli 2011 | ||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||
HGF - Programmthema: | Starrflügler (alt) | ||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||
DLR - Forschungsgebiet: | L AR - Starrflüglerforschung | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Flugphysik (alt) | ||||||||||||||||
Standort: | Göttingen | ||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren | ||||||||||||||||
Hinterlegt von: | Micknaus, Ilka | ||||||||||||||||
Hinterlegt am: | 16 Aug 2011 12:51 | ||||||||||||||||
Letzte Änderung: | 24 Apr 2024 19:35 |
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