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Measurements of flow-induced excitation of lightweight vehicle structures

Galuba, Judith und Spehr, Carsten (2015) Measurements of flow-induced excitation of lightweight vehicle structures. inter.noise2015, 2015-08-09 - 2015-08-12, San Francisco, CA, USA.

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Offizielle URL: http://internoise2015.com/

Kurzfassung

The use of lightweight construction in vehicle manufacturing is an interesting possibility for reducing fuel consumption. At present lightweight constructions are being used to lower the weight not only of new aircraft but also of new terrestrial vehicles. However, these construction methods using new materials place new demands on the level of vehicle acoustics to ensure that passenger comfort is maintained and/or improved. The acoustic and hydrodynamic pressure fluctuations arising from excitation of the fuselage during cruise flight, of the side window in cars and of the body of high-speed trains is one of the major sources of noise. The German Aerospace Center conducted three flight tests on a single aisle medium-range aircraft to measure the noise excitation, transmission and radiation into the cabin. These measurements are used to quantify the excitation and to validate numerical simulations. A pressure sensor array was used to measure the turbulent boundary layer. With this array it was possible to separate the hydrodynamic from the acoustic pressure fluctuations. The results are used to describe the aeroacoustic sources in a more precise manner than that given by the two current, state of the art models (Corcos, Efimtsov). These same methods were used to measure the hydrodynamic and acoustic pressure fluctuations at the side window of a generic car model.

elib-URL des Eintrags:https://elib.dlr.de/96139/
Dokumentart:Konferenzbeitrag (Vortrag)
Zusätzliche Informationen:in15_252
Titel:Measurements of flow-induced excitation of lightweight vehicle structures
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Galuba, Judithjudith.galuba (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Spehr, CarstenCarsten.Spehr (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2015
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-10
Name der Reihe:Conference Proceedings on USB-Stick
Status:veröffentlicht
Stichwörter:lightweight structures, measurements of flow-induced excitation, aeroacoustic sources, vehicle acoustics, flight test
Veranstaltungstitel:inter.noise2015
Veranstaltungsort:San Francisco, CA, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:9 August 2015
Veranstaltungsende:12 August 2015
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 - Simulation und Validierung (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren
Hinterlegt von: Micknaus, Ilka
Hinterlegt am:19 Aug 2015 15:03
Letzte Änderung:24 Apr 2024 20:01

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