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Fuselage Excitation During Cruise Flight Conditions: Measurement and Prediction of Pressure Point Spectra

Klabes, Alexander und Appel, Christina und Herr, Michaela und Bouhaj, Mohamed (2015) Fuselage Excitation During Cruise Flight Conditions: Measurement and Prediction of Pressure Point Spectra. AIAA Aviation, 21st AIAA/CEAS Aeroacoustics Conference, 2015-06-22 - 2015-06-26, Dallas, Texas, USA. doi: 10.2514/6.2015-3115.

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Kurzfassung

In the last �fifty years many semi-empirical models to predict surface pressure fluctuations beneath turbulent boundary layers (TBL) have been developed for a large variety of test conditions. Nowadays, the relevance of the TBL as a source of cabin interior noise is steadily increasing, due to quieter aircraft engines. The possibility of predicting surface pressure auto-spectra with the various publicly available semi-empirical models at several positions on the fuselage of DLR's Advanced Technology Research Aircraft (ATRA) is investigated. A large validation database was used, involving in-flight measurements at different flight levels (FL) and Mach numbers, applying two different sensor types. Predictions were performed based on semi-empirically estimated TBL parameters (partly included in the different models) and, additionally, based on TBL properties that were extracted from CFD simulations. This procedure served to identify different sources of error in the prediction. Overall, it is shown that today's models provide a large (> 10 dB) scatter among the predicted spectra. Even the most suitable approaches are not generally applicable to all relevant positions at the fuselage. Particularly in regions with strong pressure gradients and high turbulence kinetic energy measured auto-spectra cannot be reproduced with su�fficient accuracy. This indicates the need for more universally applicable CFD- and CAA-based surface pressure prediction methods.

elib-URL des Eintrags:https://elib.dlr.de/97218/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Fuselage Excitation During Cruise Flight Conditions: Measurement and Prediction of Pressure Point Spectra
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Klabes, Alexanderalexander.klabes (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Appel, Christinachristina.appel (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Herr, Michaelamichaela.herr (at) dlr.dehttps://orcid.org/0009-0000-7275-7078NICHT SPEZIFIZIERT
Bouhaj, Mohamedmohamed.bouhaj (at) airbus.comNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:22 Juni 2015
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.2514/6.2015-3115
Status:veröffentlicht
Stichwörter:TBL, Fuselage excitation, flight test, ATRA, Airbus, auto-spectra
Veranstaltungstitel:AIAA Aviation, 21st AIAA/CEAS Aeroacoustics Conference
Veranstaltungsort:Dallas, Texas, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:22 Juni 2015
Veranstaltungsende:26 Juni 2015
Veranstalter :AIAA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Systeme und Kabine (alt), L - Simulation und Validierung (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Technische Akustik
Hinterlegt von: Klabes, Alexander
Hinterlegt am:20 Jul 2015 16:10
Letzte Änderung:24 Apr 2024 20:02

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